Commit 4e76c5cc authored by Linus Torvalds's avatar Linus Torvalds

Merge git://git.kernel.org/pub/scm/linux/kernel/git/czankel/xtensa-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/czankel/xtensa-2.6: (21 commits)
  xtensa: we don't need to include asm/io.h
  xtensa: only build platform or variant if they contain a Makefile
  xtensa: make startup code discardable
  xtensa: ccount clocksource
  xtensa: remove platform rtc hooks
  xtensa: use generic sched_clock()
  xtensa: platform: s6105
  xtensa: let platform override KERNELOFFSET
  xtensa: s6000 variant
  xtensa: s6000 variant core definitions
  xtensa: variant irq set callbacks
  xtensa: variant-specific code
  xtensa: nommu support
  xtensa: add flat support
  xtensa: enforce slab alignment to maximum register width
  xtensa: cope with ram beginning at higher addresses
  xtensa: don't make bootmem bitmap larger than required
  xtensa: fix init_bootmem_node() argument order
  xtensa: use correct stack pointer for stack traces
  xtensa: beat Kconfig into shape
  ...
parents b9834717 65127d28
......@@ -4,16 +4,13 @@
mainmenu "Linux/Xtensa Kernel Configuration"
config FRAME_POINTER
bool
default n
def_bool n
config ZONE_DMA
bool
default y
def_bool y
config XTENSA
bool
default y
def_bool y
select HAVE_IDE
help
Xtensa processors are 32-bit RISC machines designed by Tensilica
......@@ -24,28 +21,25 @@ config XTENSA
a home page at <http://xtensa.sourceforge.net/>.
config RWSEM_XCHGADD_ALGORITHM
bool
default y
def_bool y
config GENERIC_FIND_NEXT_BIT
bool
default y
def_bool y
config GENERIC_HWEIGHT
bool
default y
def_bool y
config GENERIC_HARDIRQS
bool
default y
def_bool y
config GENERIC_GPIO
def_bool y
config ARCH_HAS_ILOG2_U32
bool
default n
def_bool n
config ARCH_HAS_ILOG2_U64
bool
default n
def_bool n
config NO_IOPORT
def_bool y
......@@ -54,9 +48,18 @@ config HZ
int
default 100
config GENERIC_TIME
def_bool y
source "init/Kconfig"
source "kernel/Kconfig.freezer"
config MMU
def_bool n
config VARIANT_IRQ_SWITCH
def_bool n
menu "Processor type and features"
choice
......@@ -65,38 +68,41 @@ choice
config XTENSA_VARIANT_FSF
bool "fsf - default (not generic) configuration"
select MMU
config XTENSA_VARIANT_DC232B
bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
select MMU
help
This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).
endchoice
This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).
config MMU
bool
default y
config XTENSA_VARIANT_S6000
bool "s6000 - Stretch software configurable processor"
select VARIANT_IRQ_SWITCH
select ARCH_REQUIRE_GPIOLIB
endchoice
config XTENSA_UNALIGNED_USER
bool "Unaligned memory access in use space"
---help---
The Xtensa architecture currently does not handle unaligned
memory accesses in hardware but through an exception handler.
Per default, unaligned memory accesses are disabled in user space.
help
The Xtensa architecture currently does not handle unaligned
memory accesses in hardware but through an exception handler.
Per default, unaligned memory accesses are disabled in user space.
Say Y here to enable unaligned memory access in user space.
Say Y here to enable unaligned memory access in user space.
config PREEMPT
bool "Preemptible Kernel"
---help---
This option reduces the latency of the kernel when reacting to
real-time or interactive events by allowing a low priority process to
be preempted even if it is in kernel mode executing a system call.
Unfortunately the kernel code has some race conditions if both
CONFIG_SMP and CONFIG_PREEMPT are enabled, so this option is
currently disabled if you are building an SMP kernel.
help
This option reduces the latency of the kernel when reacting to
real-time or interactive events by allowing a low priority process to
be preempted even if it is in kernel mode executing a system call.
Unfortunately the kernel code has some race conditions if both
CONFIG_SMP and CONFIG_PREEMPT are enabled, so this option is
currently disabled if you are building an SMP kernel.
Say Y here if you are building a kernel for a desktop, embedded
or real-time system. Say N if you are unsure.
Say Y here if you are building a kernel for a desktop, embedded
or real-time system. Say N if you are unsure.
config MATH_EMULATION
bool "Math emulation"
......@@ -105,6 +111,32 @@ config MATH_EMULATION
endmenu
config XTENSA_CALIBRATE_CCOUNT
def_bool n
help
On some platforms (XT2000, for example), the CPU clock rate can
vary. The frequency can be determined, however, by measuring
against a well known, fixed frequency, such as an UART oscillator.
config SERIAL_CONSOLE
def_bool n
config XTENSA_ISS_NETWORK
def_bool n
menu "Bus options"
config PCI
bool "PCI support"
default y
help
Find out whether you have a PCI motherboard. PCI is the name of a
bus system, i.e. the way the CPU talks to the other stuff inside
your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
VESA. If you have PCI, say Y, otherwise N.
source "drivers/pci/Kconfig"
menu "Platform options"
choice
......@@ -113,33 +145,35 @@ choice
config XTENSA_PLATFORM_ISS
bool "ISS"
select XTENSA_CALIBRATE_CCOUNT
select SERIAL_CONSOLE
select XTENSA_ISS_NETWORK
help
ISS is an acronym for Tensilica's Instruction Set Simulator.
config XTENSA_PLATFORM_XT2000
bool "XT2000"
select XTENSA_CALIBRATE_CCOUNT
select PCI
help
XT2000 is the name of Tensilica's feature-rich emulation platform.
This hardware is capable of running a full Linux distribution.
endchoice
config XTENSA_PLATFORM_S6105
bool "S6105"
select SERIAL_CONSOLE
endchoice
config XTENSA_CALIBRATE_CCOUNT
bool "Auto calibration of the CPU clock rate"
---help---
On some platforms (XT2000, for example), the CPU clock rate can
vary. The frequency can be determined, however, by measuring
against a well known, fixed frequency, such as an UART oscillator.
config XTENSA_CPU_CLOCK
int "CPU clock rate [MHz]"
depends on !XTENSA_CALIBRATE_CCOUNT
default "16"
default 16
config GENERIC_CALIBRATE_DELAY
bool "Auto calibration of the BogoMIPS value"
---help---
help
The BogoMIPS value can easily be derived from the CPU frequency.
config CMDLINE_BOOL
......@@ -156,52 +190,27 @@ config CMDLINE
time by entering them here. As a minimum, you should specify the
memory size and the root device (e.g., mem=64M root=/dev/nfs).
config SERIAL_CONSOLE
bool
depends on XTENSA_PLATFORM_ISS
default y
config XTENSA_ISS_NETWORK
bool
depends on XTENSA_PLATFORM_ISS
default y
source "mm/Kconfig"
endmenu
menu "Bus options"
config PCI
bool "PCI support" if !XTENSA_PLATFORM_ISS
depends on !XTENSA_PLATFORM_ISS
default y
config HOTPLUG
bool "Support for hot-pluggable devices"
help
Find out whether you have a PCI motherboard. PCI is the name of a
bus system, i.e. the way the CPU talks to the other stuff inside
your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
VESA. If you have PCI, say Y, otherwise N.
Say Y here if you want to plug devices into your computer while
the system is running, and be able to use them quickly. In many
cases, the devices can likewise be unplugged at any time too.
source "drivers/pci/Kconfig"
One well known example of this is PCMCIA- or PC-cards, credit-card
size devices such as network cards, modems or hard drives which are
plugged into slots found on all modern laptop computers. Another
example, used on modern desktops as well as laptops, is USB.
config HOTPLUG
bool "Support for hot-pluggable devices"
---help---
Say Y here if you want to plug devices into your computer while
the system is running, and be able to use them quickly. In many
cases, the devices can likewise be unplugged at any time too.
One well known example of this is PCMCIA- or PC-cards, credit-card
size devices such as network cards, modems or hard drives which are
plugged into slots found on all modern laptop computers. Another
example, used on modern desktops as well as laptops, is USB.
Enable HOTPLUG and build a modular kernel. Get agent software
(from <http://linux-hotplug.sourceforge.net/>) and install it.
Then your kernel will automatically call out to a user mode "policy
agent" (/sbin/hotplug) to load modules and set up software needed
to use devices as you hotplug them.
Enable HOTPLUG and build a modular kernel. Get agent software
(from <http://linux-hotplug.sourceforge.net/>) and install it.
Then your kernel will automatically call out to a user mode "policy
agent" (/sbin/hotplug) to load modules and set up software needed
to use devices as you hotplug them.
source "drivers/pcmcia/Kconfig"
......@@ -213,9 +222,8 @@ menu "Executable file formats"
# only elf supported
config KCORE_ELF
bool
def_bool y
depends on PROC_FS
default y
help
If you enabled support for /proc file system then the file
/proc/kcore will contain the kernel core image in ELF format. This
......@@ -240,7 +248,7 @@ source "fs/Kconfig"
menu "Xtensa initrd options"
depends on BLK_DEV_INITRD
config EMBEDDED_RAMDISK
config EMBEDDED_RAMDISK
bool "Embed root filesystem ramdisk into the kernel"
config EMBEDDED_RAMDISK_IMAGE
......
......@@ -15,6 +15,7 @@
variant-$(CONFIG_XTENSA_VARIANT_FSF) := fsf
variant-$(CONFIG_XTENSA_VARIANT_DC232B) := dc232b
variant-$(CONFIG_XTENSA_VARIANT_S6000) := s6000
variant-$(CONFIG_XTENSA_VARIANT_LINUX_CUSTOM) := custom
VARIANT = $(variant-y)
......@@ -24,6 +25,7 @@ export VARIANT
platform-$(CONFIG_XTENSA_PLATFORM_XT2000) := xt2000
platform-$(CONFIG_XTENSA_PLATFORM_ISS) := iss
platform-$(CONFIG_XTENSA_PLATFORM_S6105) := s6105
PLATFORM = $(platform-y)
export PLATFORM
......@@ -62,20 +64,23 @@ ifneq ($(VARIANT),)
endif
endif
#
# Only build variant and/or platform if it includes a Makefile
buildvar := $(shell test -a $(srctree)/arch/xtensa/variants/$(VARIANT)/Makefile && echo arch/xtensa/variants/$(VARIANT)/)
buildplf := $(shell test -a $(srctree)/arch/xtensa/platforms/$(PLATFORM)/Makefile && echo arch/xtensa/platforms/$(PLATFORM)/)
# Find libgcc.a
LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
head-y := arch/xtensa/kernel/head.o
core-y += arch/xtensa/kernel/ arch/xtensa/mm/
ifneq ($(PLATFORM),)
core-y += arch/xtensa/platforms/$(PLATFORM)/
endif
core-y += $(buildvar) $(buildplf)
libs-y += arch/xtensa/lib/ $(LIBGCC)
boot := arch/xtensa/boot
all: zImage
bzImage : zImage
......
This diff is collapsed.
......@@ -65,13 +65,17 @@ extern void __flush_invalidate_dcache_range(unsigned long, unsigned long);
# define __flush_invalidate_dcache_range(p,s) __invalidate_dcache_range(p,s)
#endif
#if (DCACHE_WAY_SIZE > PAGE_SIZE)
#if defined(CONFIG_MMU) && (DCACHE_WAY_SIZE > PAGE_SIZE)
extern void __flush_invalidate_dcache_page_alias(unsigned long, unsigned long);
#else
static inline void __flush_invalidate_dcache_page_alias(unsigned long virt,
unsigned long phys) { }
#endif
#if (ICACHE_WAY_SIZE > PAGE_SIZE)
#if defined(CONFIG_MMU) && (ICACHE_WAY_SIZE > PAGE_SIZE)
extern void __invalidate_icache_page_alias(unsigned long, unsigned long);
#else
# define __invalidate_icache_page_alias(v,p) do { } while(0)
static inline void __invalidate_icache_page_alias(unsigned long virt,
unsigned long phys) { }
#endif
/*
......
......@@ -44,8 +44,9 @@
* the value desired).
*/
#ifndef MAX_DMA_ADDRESS
#define MAX_DMA_ADDRESS (PAGE_OFFSET + XCHAL_KIO_SIZE - 1)
#endif
/* Reserve and release a DMA channel */
extern int request_dma(unsigned int dmanr, const char * device_id);
......
#ifndef __ASM_XTENSA_FLAT_H
#define __ASM_XTENSA_FLAT_H
#define flat_argvp_envp_on_stack() 0
#define flat_old_ram_flag(flags) (flags)
#define flat_reloc_valid(reloc, size) ((reloc) <= (size))
#define flat_get_addr_from_rp(rp, relval, flags, p) get_unaligned(rp)
#define flat_put_addr_at_rp(rp, val, relval ) put_unaligned(val, rp)
#define flat_get_relocate_addr(rel) (rel)
#define flat_set_persistent(relval, p) 0
#endif /* __ASM_XTENSA_FLAT_H */
/*
* Generic GPIO API implementation for xtensa.
*
* Stolen from x86, which is derived from the generic GPIO API for powerpc:
*
* Copyright (c) 2007-2008 MontaVista Software, Inc.
*
* Author: Anton Vorontsov <avorontsov@ru.mvista.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef _ASM_XTENSA_GPIO_H
#define _ASM_XTENSA_GPIO_H
#include <asm-generic/gpio.h>
#ifdef CONFIG_GPIOLIB
/*
* Just call gpiolib.
*/
static inline int gpio_get_value(unsigned int gpio)
{
return __gpio_get_value(gpio);
}
static inline void gpio_set_value(unsigned int gpio, int value)
{
__gpio_set_value(gpio, value);
}
static inline int gpio_cansleep(unsigned int gpio)
{
return __gpio_cansleep(gpio);
}
/*
* Not implemented, yet.
*/
static inline int gpio_to_irq(unsigned int gpio)
{
return -ENOSYS;
}
static inline int irq_to_gpio(unsigned int irq)
{
return -EINVAL;
}
#endif /* CONFIG_GPIOLIB */
#endif /* _ASM_XTENSA_GPIO_H */
......@@ -69,21 +69,28 @@ static inline void * phys_to_virt(unsigned long address)
static inline void *ioremap(unsigned long offset, unsigned long size)
{
#ifdef CONFIG_MMU
if (offset >= XCHAL_KIO_PADDR
&& offset < XCHAL_KIO_PADDR + XCHAL_KIO_SIZE)
return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_BYPASS_VADDR);
else
BUG();
#else
return (void *)offset;
#endif
}
static inline void *ioremap_nocache(unsigned long offset, unsigned long size)
{
#ifdef CONFIG_MMU
if (offset >= XCHAL_KIO_PADDR
&& offset < XCHAL_KIO_PADDR + XCHAL_KIO_SIZE)
return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_CACHED_VADDR);
else
BUG();
#else
return (void *)offset;
#endif
}
static inline void iounmap(void *addr)
......
......@@ -14,6 +14,13 @@
#include <platform/hardware.h>
#include <variant/core.h>
#ifdef CONFIG_VARIANT_IRQ_SWITCH
#include <variant/irq.h>
#else
static inline void variant_irq_enable(unsigned int irq) { }
static inline void variant_irq_disable(unsigned int irq) { }
#endif
#ifndef PLATFORM_NR_IRQS
# define PLATFORM_NR_IRQS 0
#endif
......
......@@ -11,7 +11,12 @@
#ifndef _XTENSA_MMU_H
#define _XTENSA_MMU_H
#ifndef CONFIG_MMU
#include <asm/nommu.h>
#else
/* Default "unsigned long" context */
typedef unsigned long mm_context_t;
#endif /* CONFIG_MMU */
#endif /* _XTENSA_MMU_H */
......@@ -13,16 +13,20 @@
#ifndef _XTENSA_MMU_CONTEXT_H
#define _XTENSA_MMU_CONTEXT_H
#ifndef CONFIG_MMU
#include <asm/nommu_context.h>
#else
#include <linux/stringify.h>
#include <linux/sched.h>
#include <variant/core.h>
#include <asm/pgtable.h>
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
#include <asm-generic/mm_hooks.h>
#define XCHAL_MMU_ASID_BITS 8
#if (XCHAL_HAVE_TLBS != 1)
# error "Linux must have an MMU!"
#endif
......@@ -133,4 +137,5 @@ static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
}
#endif /* CONFIG_MMU */
#endif /* _XTENSA_MMU_CONTEXT_H */
typedef struct {
unsigned long end_brk;
} mm_context_t;
static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
{
}
static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
{
return 0;
}
static inline void destroy_context(struct mm_struct *mm)
{
}
static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next)
{
}
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
struct task_struct *tsk)
{
}
static inline void deactivate_mm(struct task_struct *tsk, struct mm_struct *mm)
{
}
......@@ -14,6 +14,7 @@
#include <asm/processor.h>
#include <asm/types.h>
#include <asm/cache.h>
#include <platform/hardware.h>
/*
* Fixed TLB translations in the processor.
......@@ -32,8 +33,14 @@
#define PAGE_SIZE (__XTENSA_UL_CONST(1) << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
#ifdef CONFIG_MMU
#define PAGE_OFFSET XCHAL_KSEG_CACHED_VADDR
#define MAX_MEM_PFN XCHAL_KSEG_SIZE
#else
#define PAGE_OFFSET 0
#define MAX_MEM_PFN (PLATFORM_DEFAULT_MEM_START + PLATFORM_DEFAULT_MEM_SIZE)
#endif
#define PGTABLE_START 0x80000000
/*
......@@ -150,9 +157,11 @@ extern void copy_user_page(void*, void*, unsigned long, struct page*);
* addresses.
*/
#define ARCH_PFN_OFFSET (PLATFORM_DEFAULT_MEM_START >> PAGE_SHIFT)
#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
#define pfn_valid(pfn) ((unsigned long)pfn < max_mapnr)
#define pfn_valid(pfn) ((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
#ifdef CONFIG_DISCONTIGMEM
# error CONFIG_DISCONTIGMEM not supported
#endif
......@@ -162,8 +171,9 @@ extern void copy_user_page(void*, void*, unsigned long, struct page*);
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
#ifdef CONFIG_MMU
#define WANT_PAGE_VIRTUAL
#endif
#endif /* __ASSEMBLY__ */
......
......@@ -183,7 +183,15 @@ extern unsigned long empty_zero_page[1024];
#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
#ifdef CONFIG_MMU
extern pgd_t swapper_pg_dir[PAGE_SIZE/sizeof(pgd_t)];
extern void paging_init(void);
extern void pgtable_cache_init(void);
#else
# define swapper_pg_dir NULL
static inline void paging_init(void) { }
static inline void pgtable_cache_init(void) { }
#endif
/*
* The pmd contains the kernel virtual address of the pte page.
......@@ -383,8 +391,6 @@ ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
#else
extern void paging_init(void);
#define kern_addr_valid(addr) (1)
extern void update_mmu_cache(struct vm_area_struct * vma,
......@@ -398,9 +404,6 @@ extern void update_mmu_cache(struct vm_area_struct * vma,
#define io_remap_pfn_range(vma,from,pfn,size,prot) \
remap_pfn_range(vma, from, pfn, size, prot)
extern void pgtable_cache_init(void);
typedef pte_t *pte_addr_t;
#endif /* !defined (__ASSEMBLY__) */
......
......@@ -74,16 +74,5 @@ extern int platform_pcibios_fixup (void);
*/
extern void platform_calibrate_ccount (void);
/*
* platform_get_rtc_time returns RTC seconds (returns 0 for no error)
*/
extern int platform_get_rtc_time(time_t*);
/*
* platform_set_rtc_time set RTC seconds (returns 0 for no error)
*/
extern int platform_set_rtc_time(time_t);
#endif /* _XTENSA_PLATFORM_H */
......@@ -13,6 +13,7 @@
#include <variant/core.h>
#include <asm/coprocessor.h>
#include <platform/hardware.h>
#include <linux/compiler.h>
#include <asm/ptrace.h>
......@@ -25,6 +26,8 @@
# error Linux requires the Xtensa Windowed Registers Option.
#endif
#define ARCH_SLAB_MINALIGN XCHAL_DATA_WIDTH
/*
* User space process size: 1 GB.
* Windowed call ABI requires caller and callee to be located within the same
......@@ -33,7 +36,12 @@
* the 1 GB requirement applies to the stack as well.
*/
#ifdef CONFIG_MMU
#define TASK_SIZE __XTENSA_UL_CONST(0x40000000)
#else
#define TASK_SIZE (PLATFORM_DEFAULT_MEM_START + PLATFORM_DEFAULT_MEM_SIZE)
#endif
#define STACK_TOP TASK_SIZE
#define STACK_TOP_MAX STACK_TOP
......
......@@ -1463,6 +1463,7 @@ ENTRY(_spill_registers)
callx0 a0 # should not return
1: j 1b
#ifdef CONFIG_MMU
/*
* We should never get here. Bail out!
*/
......@@ -1775,7 +1776,7 @@ ENTRY(fast_store_prohibited)
bbsi.l a2, PS_UM_BIT, 1f
j _kernel_exception
1: j _user_exception
#endif /* CONFIG_MMU */
/*
* System Calls.
......
......@@ -53,7 +53,7 @@ _start: _j 2f
2: l32r a0, 1b
jx a0
.text
.section .init.text, "ax"
.align 4
_startup:
......@@ -235,8 +235,9 @@ should_never_return:
*/
.section ".bss.page_aligned", "w"
#ifdef CONFIG_MMU
ENTRY(swapper_pg_dir)
.fill PAGE_SIZE, 1, 0
#endif
ENTRY(empty_zero_page)
.fill PAGE_SIZE, 1, 0
......@@ -132,6 +132,18 @@ static void xtensa_irq_unmask(unsigned int irq)
set_sr (cached_irq_mask, INTENABLE);
}
static void xtensa_irq_enable(unsigned int irq)
{
variant_irq_enable(irq);
xtensa_irq_unmask(irq);
}
static void xtensa_irq_disable(unsigned int irq)
{
xtensa_irq_mask(irq);
variant_irq_disable(irq);
}
static void xtensa_irq_ack(unsigned int irq)
{
set_sr(1 << irq, INTCLEAR);
......@@ -146,6 +158,8 @@ static int xtensa_irq_retrigger(unsigned int irq)
static struct irq_chip xtensa_irq_chip = {
.name = "xtensa",
.enable = xtensa_irq_enable,
.disable = xtensa_irq_disable,
.mask = xtensa_irq_mask,
.unmask = xtensa_irq_unmask,
.ack = xtensa_irq_ack,
......
......@@ -36,8 +36,6 @@ _F(void, power_off, (void), { while(1); });
_F(void, idle, (void), { __asm__ __volatile__ ("waiti 0" ::: "memory"); });
_F(void, heartbeat, (void), { });
_F(int, pcibios_fixup, (void), { return 0; });
_F(int, get_rtc_time, (time_t* t), { return 0; });
_F(int, set_rtc_time, (time_t t), { return 0; });
#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
_F(void, calibrate_ccount, (void),
......
......@@ -84,7 +84,13 @@ sysmem_info_t __initdata sysmem;
int initrd_is_mapped;
#endif
#ifdef CONFIG_MMU
extern void init_mmu(void);
#else
static inline void init_mmu(void) { }
#endif
extern void zones_init(void);
/*
* Boot parameter parsing.
......@@ -286,6 +292,7 @@ void __init setup_arch(char **cmdline_p)
paging_init();
zones_init();
#ifdef CONFIG_VT
# if defined(CONFIG_VGA_CONSOLE)
......
......@@ -14,7 +14,7 @@
#include <linux/errno.h>
#include <linux/time.h>
#include <linux/timex.h>
#include <linux/clocksource.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/init.h>
......@@ -25,27 +25,31 @@
#include <asm/timex.h>
#include <asm/platform.h>
DEFINE_SPINLOCK(rtc_lock);
EXPORT_SYMBOL(rtc_lock);
#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
unsigned long ccount_per_jiffy; /* per 1/HZ */
unsigned long nsec_per_ccount; /* nsec per ccount increment */
#endif
static long last_rtc_update = 0;
/*
* Scheduler clock - returns current tim in nanosec units.
*/
unsigned long long sched_clock(void)
static cycle_t ccount_read(void)
{
return (unsigned long long)jiffies * (1000000000 / HZ);
return (cycle_t)get_ccount();
}
static struct clocksource ccount_clocksource = {
.name = "ccount",
.rating = 200,
.read = ccount_read,
.mask = CLOCKSOURCE_MASK(32),
/*
* With a shift of 22 the lower limit of the cpu clock is
* 1MHz, where NSEC_PER_CCOUNT is 1000 or a bit less than
* 2^10: Since we have 32 bits and the multiplicator can
* already take up as much as 10 bits, this leaves us with
* remaining upper 22 bits.
*/
.shift = 22,
};
static irqreturn_t timer_interrupt(int irq, void *dev_id);
static struct irqaction timer_irqaction = {
.handler = timer_interrupt,
......@@ -55,11 +59,11 @@ static struct irqaction timer_irqaction = {
void __init time_init(void)
{
time_t sec_o, sec_n = 0;
xtime.tv_nsec = 0;
xtime.tv_sec = read_persistent_clock();
/* The platform must provide a function to calibrate the processor
* speed for the CALIBRATE.
*/
set_normalized_timespec(&wall_to_monotonic,
-xtime.tv_sec, -xtime.tv_nsec);
#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
printk("Calibrating CPU frequency ");
......@@ -67,19 +71,10 @@ void __init time_init(void)
printk("%d.%02d MHz\n", (int)ccount_per_jiffy/(1000000/HZ),
(int)(ccount_per_jiffy/(10000/HZ))%100);
#endif
/* Set time from RTC (if provided) */
if (platform_get_rtc_time(&sec_o) == 0)
while (platform_get_rtc_time(&sec_n))
if (sec_o != sec_n)
break;
xtime.tv_nsec = 0;
last_rtc_update = xtime.tv_sec = sec_n;
set_normalized_timespec(&wall_to_monotonic,
-xtime.tv_sec, -xtime.tv_nsec);
ccount_clocksource.mult =
clocksource_hz2mult(CCOUNT_PER_JIFFY * HZ,
ccount_clocksource.shift);
clocksource_register(&ccount_clocksource);
/* Initialize the linux timer interrupt. */
......@@ -87,69 +82,6 @@ void __init time_init(void)
set_linux_timer(get_ccount() + CCOUNT_PER_JIFFY);
}
int do_settimeofday(struct timespec *tv)
{
time_t wtm_sec, sec = tv->tv_sec;
long wtm_nsec, nsec = tv->tv_nsec;
unsigned long delta;
if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
return -EINVAL;
write_seqlock_irq(&xtime_lock);
/* This is revolting. We need to set "xtime" correctly. However, the
* value in this location is the value at the most recent update of
* wall time. Discover what correction gettimeofday() would have
* made, and then undo it!
*/
delta = CCOUNT_PER_JIFFY;
delta += get_ccount() - get_linux_timer();
nsec -= delta * NSEC_PER_CCOUNT;
wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
set_normalized_timespec(&xtime, sec, nsec);
set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec);
ntp_clear();
write_sequnlock_irq(&xtime_lock);
return 0;
}
EXPORT_SYMBOL(do_settimeofday);
void do_gettimeofday(struct timeval *tv)
{
unsigned long flags;
unsigned long volatile sec, usec, delta, seq;
do {
seq = read_seqbegin_irqsave(&xtime_lock, flags);
sec = xtime.tv_sec;
usec = (xtime.tv_nsec / NSEC_PER_USEC);
delta = get_linux_timer() - get_ccount();
} while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
usec += (((unsigned long) CCOUNT_PER_JIFFY - delta)
* (unsigned long) NSEC_PER_CCOUNT) / NSEC_PER_USEC;
for (; usec >= 1000000; sec++, usec -= 1000000)
;
tv->tv_sec = sec;
tv->tv_usec = usec;
}
EXPORT_SYMBOL(do_gettimeofday);
/*
* The timer interrupt is called HZ times per second.
*/
......@@ -178,16 +110,6 @@ irqreturn_t timer_interrupt (int irq, void *dev_id)
next += CCOUNT_PER_JIFFY;
set_linux_timer(next);
if (ntp_synced() &&
xtime.tv_sec - last_rtc_update >= 659 &&
abs((xtime.tv_nsec/1000)-(1000000-1000000/HZ))<5000000/HZ) {
if (platform_set_rtc_time(xtime.tv_sec+1) == 0)
last_rtc_update = xtime.tv_sec+1;
else
/* Do it again in 60 s */
last_rtc_update += 60;
}
write_sequnlock(&xtime_lock);
}
......@@ -213,4 +135,3 @@ void __cpuinit calibrate_delay(void)
(loops_per_jiffy/(10000/HZ)) % 100);
}
#endif
......@@ -104,6 +104,7 @@ static dispatch_init_table_t __initdata dispatch_init_table[] = {
#endif
{ EXCCAUSE_UNALIGNED, KRNL, fast_unaligned },
#endif
#ifdef CONFIG_MMU
{ EXCCAUSE_ITLB_MISS, 0, do_page_fault },
{ EXCCAUSE_ITLB_MISS, USER|KRNL, fast_second_level_miss},
{ EXCCAUSE_ITLB_MULTIHIT, 0, do_multihit },
......@@ -118,6 +119,7 @@ static dispatch_init_table_t __initdata dispatch_init_table[] = {
{ EXCCAUSE_STORE_CACHE_ATTRIBUTE, USER|KRNL, fast_store_prohibited },
{ EXCCAUSE_STORE_CACHE_ATTRIBUTE, 0, do_page_fault },
{ EXCCAUSE_LOAD_CACHE_ATTRIBUTE, 0, do_page_fault },
#endif /* CONFIG_MMU */
/* XCCHAL_EXCCAUSE_FLOATING_POINT unhandled */
#if XTENSA_HAVE_COPROCESSOR(0)
COPROCESSOR(0),
......@@ -372,11 +374,10 @@ void show_trace(struct task_struct *task, unsigned long *sp)
unsigned long a0, a1, pc;
unsigned long sp_start, sp_end;
a1 = (unsigned long)sp;
if (a1 == 0)
__asm__ __volatile__ ("mov %0, a1\n" : "=a"(a1));
if (sp)
a1 = (unsigned long)sp;
else
a1 = task->thread.sp;
sp_start = a1 & ~(THREAD_SIZE-1);
sp_end = sp_start + THREAD_SIZE;
......@@ -418,9 +419,8 @@ void show_stack(struct task_struct *task, unsigned long *sp)
int i = 0;
unsigned long *stack;
if (sp == 0)
__asm__ __volatile__ ("mov %0, a1\n" : "=a"(sp));
if (!sp)
sp = (unsigned long *)task->thread.sp;
stack = sp;
printk("\nStack: ");
......
......@@ -309,6 +309,7 @@ ENTRY(_DoubleExceptionVector)
* All other exceptions are unexpected and thus unrecoverable!
*/
#ifdef CONFIG_MMU
.extern fast_second_level_miss_double_kernel
.Lksp: /* a0: a0, a1: a1, a2: a2, a3: trashed, depc: depc, excsave: a3 */
......@@ -319,6 +320,9 @@ ENTRY(_DoubleExceptionVector)
bnez a3, .Lunrecoverable
1: movi a3, fast_second_level_miss_double_kernel
jx a3
#else
.equ .Lksp, .Lunrecoverable
#endif
/* Critical! We can't handle this situation. PANIC! */
......
......@@ -17,6 +17,7 @@
#include <asm-generic/vmlinux.lds.h>
#include <variant/core.h>
#include <platform/hardware.h>
OUTPUT_ARCH(xtensa)
ENTRY(_start)
......@@ -26,7 +27,9 @@ jiffies = jiffies_64 + 4;
jiffies = jiffies_64;
#endif
#ifndef KERNELOFFSET
#define KERNELOFFSET 0xd0001000
#endif
/* Note: In the following macros, it would be nice to specify only the
vector name and section kind and construct "sym" and "section" using
......
......@@ -2,4 +2,5 @@
# Makefile for the Linux/Xtensa-specific parts of the memory manager.
#
obj-y := init.o fault.o tlb.o misc.o cache.o
obj-y := init.o cache.o misc.o
obj-$(CONFIG_MMU) += fault.o mmu.o tlb.o
......@@ -24,15 +24,8 @@
#include <linux/mm.h>
#include <linux/slab.h>
#include <asm/pgtable.h>
#include <asm/bootparam.h>
#include <asm/mmu_context.h>
#include <asm/tlb.h>
#include <asm/page.h>
#include <asm/pgalloc.h>
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
/* References to section boundaries */
......@@ -130,7 +123,8 @@ void __init bootmem_init(void)
/* Find an area to use for the bootmem bitmap. */
bootmap_size = bootmem_bootmap_pages(max_low_pfn) << PAGE_SHIFT;
bootmap_size = bootmem_bootmap_pages(max_low_pfn - min_low_pfn);
bootmap_size <<= PAGE_SHIFT;
bootmap_start = ~0;
for (i=0; i<sysmem.nr_banks; i++)
......@@ -145,8 +139,9 @@ void __init bootmem_init(void)
/* Reserve the bootmem bitmap area */
mem_reserve(bootmap_start, bootmap_start + bootmap_size, 1);
bootmap_size = init_bootmem_node(NODE_DATA(0), min_low_pfn,
bootmap_size = init_bootmem_node(NODE_DATA(0),
bootmap_start >> PAGE_SHIFT,
min_low_pfn,
max_low_pfn);
/* Add all remaining memory pieces into the bootmem map */
......@@ -158,14 +153,14 @@ void __init bootmem_init(void)
}
void __init paging_init(void)
void __init zones_init(void)
{
unsigned long zones_size[MAX_NR_ZONES];
int i;
/* All pages are DMA-able, so we put them all in the DMA zone. */
zones_size[ZONE_DMA] = max_low_pfn;
zones_size[ZONE_DMA] = max_low_pfn - ARCH_PFN_OFFSET;
for (i = 1; i < MAX_NR_ZONES; i++)
zones_size[i] = 0;
......@@ -173,40 +168,7 @@ void __init paging_init(void)
zones_size[ZONE_HIGHMEM] = max_pfn - max_low_pfn;
#endif
/* Initialize the kernel's page tables. */
memset(swapper_pg_dir, 0, PAGE_SIZE);
free_area_init(zones_size);
}
/*
* Flush the mmu and reset associated register to default values.
*/
void __init init_mmu (void)
{
/* Writing zeros to the <t>TLBCFG special registers ensure
* that valid values exist in the register. For existing
* PGSZID<w> fields, zero selects the first element of the
* page-size array. For nonexistent PGSZID<w> fields, zero is
* the best value to write. Also, when changing PGSZID<w>
* fields, the corresponding TLB must be flushed.
*/
set_itlbcfg_register (0);
set_dtlbcfg_register (0);
flush_tlb_all ();
/* Set rasid register to a known value. */
set_rasid_register (ASID_USER_FIRST);
/* Set PTEVADDR special register to the start of the page
* table, which is in kernel mappable space (ie. not
* statically mapped). This register's value is undefined on
* reset.
*/
set_ptevaddr_register (PGTABLE_START);
free_area_init_node(0, zones_size, ARCH_PFN_OFFSET, NULL);
}
/*
......@@ -218,8 +180,8 @@ void __init mem_init(void)
unsigned long codesize, reservedpages, datasize, initsize;
unsigned long highmemsize, tmp, ram;
max_mapnr = num_physpages = max_low_pfn;
high_memory = (void *) __va(max_mapnr << PAGE_SHIFT);
max_mapnr = num_physpages = max_low_pfn - ARCH_PFN_OFFSET;
high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT);
highmemsize = 0;
#ifdef CONFIG_HIGHMEM
......@@ -229,7 +191,7 @@ void __init mem_init(void)
totalram_pages += free_all_bootmem();
reservedpages = ram = 0;
for (tmp = 0; tmp < max_low_pfn; tmp++) {
for (tmp = 0; tmp < max_mapnr; tmp++) {
ram++;
if (PageReserved(mem_map+tmp))
reservedpages++;
......@@ -279,23 +241,3 @@ void free_initmem(void)
printk("Freeing unused kernel memory: %dk freed\n",
(&__init_end - &__init_begin) >> 10);
}
struct kmem_cache *pgtable_cache __read_mostly;
static void pgd_ctor(void* addr)
{
pte_t* ptep = (pte_t*)addr;
int i;
for (i = 0; i < 1024; i++, ptep++)
pte_clear(NULL, 0, ptep);
}
void __init pgtable_cache_init(void)
{
pgtable_cache = kmem_cache_create("pgd",
PAGE_SIZE, PAGE_SIZE,
SLAB_HWCACHE_ALIGN,
pgd_ctor);
}
......@@ -84,6 +84,7 @@ ENTRY(copy_page)
retw
#ifdef CONFIG_MMU
/*
* If we have to deal with cache aliasing, we use temporary memory mappings
* to ensure that the source and destination pages have the same color as
......@@ -311,6 +312,7 @@ ENTRY(__invalidate_icache_page_alias)
/* End of special treatment in tlb miss exception */
ENTRY(__tlbtemp_mapping_end)
#endif /* CONFIG_MMU
/*
* void __invalidate_icache_page(ulong start)
......
/*
* xtensa mmu stuff
*
* Extracted from init.c
*/
#include <linux/percpu.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/cache.h>
#include <asm/tlb.h>
#include <asm/tlbflush.h>
#include <asm/mmu_context.h>
#include <asm/page.h>
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
void __init paging_init(void)
{
memset(swapper_pg_dir, 0, PAGE_SIZE);
}
/*
* Flush the mmu and reset associated register to default values.
*/
void __init init_mmu(void)
{
/* Writing zeros to the <t>TLBCFG special registers ensure
* that valid values exist in the register. For existing
* PGSZID<w> fields, zero selects the first element of the
* page-size array. For nonexistent PGSZID<w> fields, zero is
* the best value to write. Also, when changing PGSZID<w>
* fields, the corresponding TLB must be flushed.
*/
set_itlbcfg_register(0);
set_dtlbcfg_register(0);
flush_tlb_all();
/* Set rasid register to a known value. */
set_rasid_register(ASID_USER_FIRST);
/* Set PTEVADDR special register to the start of the page
* table, which is in kernel mappable space (ie. not
* statically mapped). This register's value is undefined on
* reset.
*/
set_ptevaddr_register(PGTABLE_START);
}
struct kmem_cache *pgtable_cache __read_mostly;
static void pgd_ctor(void *addr)
{
pte_t *ptep = (pte_t *)addr;
int i;
for (i = 0; i < 1024; i++, ptep++)
pte_clear(NULL, 0, ptep);
}
void __init pgtable_cache_init(void)
{
pgtable_cache = kmem_cache_create("pgd",
PAGE_SIZE, PAGE_SIZE,
SLAB_HWCACHE_ALIGN,
pgd_ctor);
}
# Makefile for the Stretch S6105 eval board
obj-y := setup.o device.o
/*
* s6105 platform devices
*
* Copyright (c) 2009 emlix GmbH
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/serial.h>
#include <linux/serial_8250.h>
#include <variant/hardware.h>
#define UART_INTNUM 4
static const signed char uart_irq_mappings[] = {
S6_INTC_UART(0),
S6_INTC_UART(1),
-1,
};
const signed char *platform_irq_mappings[NR_IRQS] = {
[UART_INTNUM] = uart_irq_mappings,
};
static struct plat_serial8250_port serial_platform_data[] = {
{
.membase = (void *)S6_REG_UART + 0x0000,
.mapbase = S6_REG_UART + 0x0000,
.irq = UART_INTNUM,
.uartclk = S6_SCLK,
.regshift = 2,
.iotype = SERIAL_IO_MEM,
.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST,
},
{
.membase = (void *)S6_REG_UART + 0x1000,
.mapbase = S6_REG_UART + 0x1000,
.irq = UART_INTNUM,
.uartclk = S6_SCLK,
.regshift = 2,
.iotype = SERIAL_IO_MEM,
.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST,
},
{ },
};
static struct platform_device platform_devices[] = {
{
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM,
.dev = {
.platform_data = serial_platform_data,
},
},
};
static int __init device_init(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(platform_devices); i++)
platform_device_register(&platform_devices[i]);
return 0;
}
arch_initcall_sync(device_init);
#ifndef __ASM_XTENSA_S6105_GPIO_H
#define __ASM_XTENSA_S6105_GPIO_H
#define GPIO_BP_TEMP_ALARM 0
#define GPIO_PB_RESET_IN 1
#define GPIO_EXP_IRQ 2
#define GPIO_TRIGGER_IRQ 3
#define GPIO_RTC_IRQ 4
#define GPIO_PHY_IRQ 5
#define GPIO_IMAGER_RESET 6
#define GPIO_SD_IRQ 7
#define GPIO_MINI_BOOT_INH 8
#define GPIO_BOARD_RESET 9
#define GPIO_EXP_PRESENT 10
#define GPIO_LED1_NGREEN 12
#define GPIO_LED1_RED 13
#define GPIO_LED0_NGREEN 14
#define GPIO_LED0_NRED 15
#define GPIO_SPI_CS0 16
#define GPIO_SPI_CS1 17
#define GPIO_SPI_CS3 19
#define GPIO_SPI_CS4 20
#define GPIO_SD_WP 21
#define GPIO_BP_RESET 22
#define GPIO_ALARM_OUT 23
#endif /* __ASM_XTENSA_S6105_GPIO_H */
#ifndef __XTENSA_S6105_HARDWARE_H
#define __XTENSA_S6105_HARDWARE_H
#define PLATFORM_DEFAULT_MEM_START 0x40000000
#define PLATFORM_DEFAULT_MEM_SIZE 0x08000000
#define MAX_DMA_ADDRESS 0
#define KERNELOFFSET (PLATFORM_DEFAULT_MEM_START + 0x1000)
#endif /* __XTENSA_S6105_HARDWARE_H */
#ifndef __ASM_XTENSA_S6105_SERIAL_H
#define __ASM_XTENSA_S6105_SERIAL_H
#include <variant/hardware.h>
#define BASE_BAUD (S6_SCLK / 16)
#endif /* __ASM_XTENSA_S6105_SERIAL_H */
/*
* s6105 control routines
*
* Copyright (c) 2009 emlix GmbH
*/
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <asm/bootparam.h>
#include <variant/hardware.h>
#include <platform/gpio.h>
void platform_halt(void)
{
local_irq_disable();
while (1)
;
}
void platform_power_off(void)
{
platform_halt();
}
void platform_restart(void)
{
platform_halt();
}
void __init platform_setup(char **cmdline)
{
unsigned long reg;
reg = readl(S6_REG_GREG1 + S6_GREG1_CLKGATE);
reg &= ~(1 << S6_GREG1_BLOCK_SB);
writel(reg, S6_REG_GREG1 + S6_GREG1_CLKGATE);
reg = readl(S6_REG_GREG1 + S6_GREG1_BLOCKENA);
reg |= 1 << S6_GREG1_BLOCK_SB;
writel(reg, S6_REG_GREG1 + S6_GREG1_BLOCKENA);
printk(KERN_NOTICE "S6105 on Stretch S6000 - "
"Copyright (C) 2009 emlix GmbH <info@emlix.com>\n");
}
void __init platform_init(bp_tag_t *first)
{
gpio_request(GPIO_LED1_NGREEN, "led1_green");
gpio_request(GPIO_LED1_RED, "led1_red");
gpio_direction_output(GPIO_LED1_NGREEN, 1);
}
void platform_heartbeat(void)
{
static unsigned int c;
if (!(++c & 0x4F))
gpio_direction_output(GPIO_LED1_RED, !(c & 0x10));
}
......@@ -16,7 +16,6 @@
#define _XTENSA_XT2000_HARDWARE_H
#include <variant/core.h>
#include <asm/io.h>
/*
* Memory configuration.
......
# s6000 Makefile
obj-y += irq.o gpio.o
/*
* s6000 gpio driver
*
* Copyright (c) 2009 emlix GmbH
* Authors: Oskar Schirmer <os@emlix.com>
* Johannes Weiner <jw@emlix.com>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <variant/hardware.h>
#define S6_GPIO_DATA 0x000
#define S6_GPIO_IS 0x404
#define S6_GPIO_IBE 0x408
#define S6_GPIO_IEV 0x40C
#define S6_GPIO_IE 0x410
#define S6_GPIO_RIS 0x414
#define S6_GPIO_MIS 0x418
#define S6_GPIO_IC 0x41C
#define S6_GPIO_AFSEL 0x420
#define S6_GPIO_DIR 0x800
#define S6_GPIO_BANK(nr) ((nr) * 0x1000)
#define S6_GPIO_MASK(nr) (4 << (nr))
#define S6_GPIO_OFFSET(nr) \
(S6_GPIO_BANK((nr) >> 3) + S6_GPIO_MASK((nr) & 7))
static int direction_input(struct gpio_chip *chip, unsigned int off)
{
writeb(0, S6_REG_GPIO + S6_GPIO_DIR + S6_GPIO_OFFSET(off));
return 0;
}
static int get(struct gpio_chip *chip, unsigned int off)
{
return readb(S6_REG_GPIO + S6_GPIO_DATA + S6_GPIO_OFFSET(off));
}
static int direction_output(struct gpio_chip *chip, unsigned int off, int val)
{
unsigned rel = S6_GPIO_OFFSET(off);
writeb(~0, S6_REG_GPIO + S6_GPIO_DIR + rel);
writeb(val ? ~0 : 0, S6_REG_GPIO + S6_GPIO_DATA + rel);
return 0;
}
static void set(struct gpio_chip *chip, unsigned int off, int val)
{
writeb(val ? ~0 : 0, S6_REG_GPIO + S6_GPIO_DATA + S6_GPIO_OFFSET(off));
}
static struct gpio_chip gpiochip = {
.owner = THIS_MODULE,
.direction_input = direction_input,
.get = get,
.direction_output = direction_output,
.set = set,
.base = 0,
.ngpio = 24,
.can_sleep = 0, /* no blocking io needed */
.exported = 0, /* no exporting to userspace */
};
static int gpio_init(void)
{
return gpiochip_add(&gpiochip);
}
device_initcall(gpio_init);
This diff is collapsed.
#ifndef __XTENSA_S6000_HARDWARE_H
#define __XTENSA_S6000_HARDWARE_H
#define S6_SCLK 1843200
#define S6_MEM_REG 0x20000000
#define S6_MEM_EFI 0x33F00000
#define S6_MEM_PCIE_DATARAM1 0x34000000
#define S6_MEM_XLMI 0x37F80000
#define S6_MEM_PIF_DATARAM1 0x37FFC000
#define S6_MEM_GMAC 0x38000000
#define S6_MEM_I2S 0x3A000000
#define S6_MEM_EGIB 0x3C000000
#define S6_MEM_PCIE_CFG 0x3E000000
#define S6_MEM_PIF_DATARAM 0x3FFE0000
#define S6_MEM_XLMI_DATARAM 0x3FFF0000
#define S6_MEM_DDR 0x40000000
#define S6_MEM_PCIE_APER 0xC0000000
#define S6_MEM_AUX 0xF0000000
/* Device addresses */
#define S6_REG_SCB S6_MEM_REG
#define S6_REG_NB (S6_REG_SCB + 0x10000)
#define S6_REG_LMSDMA (S6_REG_SCB + 0x20000)
#define S6_REG_NI (S6_REG_SCB + 0x30000)
#define S6_REG_NIDMA (S6_REG_SCB + 0x40000)
#define S6_REG_NS (S6_REG_SCB + 0x50000)
#define S6_REG_DDR (S6_REG_SCB + 0x60000)
#define S6_REG_GREG1 (S6_REG_SCB + 0x70000)
#define S6_REG_DP (S6_REG_SCB + 0x80000)
#define S6_REG_DPDMA (S6_REG_SCB + 0x90000)
#define S6_REG_EGIB (S6_REG_SCB + 0xA0000)
#define S6_REG_PCIE (S6_REG_SCB + 0xB0000)
#define S6_REG_I2S (S6_REG_SCB + 0xC0000)
#define S6_REG_GMAC (S6_REG_SCB + 0xD0000)
#define S6_REG_HIFDMA (S6_REG_SCB + 0xE0000)
#define S6_REG_GREG2 (S6_REG_SCB + 0xF0000)
#define S6_REG_APB S6_REG_SCB
#define S6_REG_UART (S6_REG_APB + 0x0000)
#define S6_REG_INTC (S6_REG_APB + 0x2000)
#define S6_REG_SPI (S6_REG_APB + 0x3000)
#define S6_REG_I2C (S6_REG_APB + 0x4000)
#define S6_REG_GPIO (S6_REG_APB + 0x8000)
/* Global register block */
#define S6_GREG1_PLL_LOCKCLEAR 0x000
#define S6_GREG1_PLL_LOCK_SYS 0
#define S6_GREG1_PLL_LOCK_IO 1
#define S6_GREG1_PLL_LOCK_AIM 2
#define S6_GREG1_PLL_LOCK_DP0 3
#define S6_GREG1_PLL_LOCK_DP2 4
#define S6_GREG1_PLL_LOCK_DDR 5
#define S6_GREG1_PLL_LOCKSTAT 0x004
#define S6_GREG1_PLL_LOCKSTAT_CURLOCK 0
#define S6_GREG1_PLL_LOCKSTAT_EVERUNLCK 8
#define S6_GREG1_PLLSEL 0x010
#define S6_GREG1_PLLSEL_AIM 0
#define S6_GREG1_PLLSEL_AIM_DDR2 0
#define S6_GREG1_PLLSEL_AIM_300MHZ 1
#define S6_GREG1_PLLSEL_AIM_240MHZ 2
#define S6_GREG1_PLLSEL_AIM_200MHZ 3
#define S6_GREG1_PLLSEL_AIM_150MHZ 4
#define S6_GREG1_PLLSEL_AIM_120MHZ 5
#define S6_GREG1_PLLSEL_AIM_40MHZ 6
#define S6_GREG1_PLLSEL_AIM_PLLAIMREF 7
#define S6_GREG1_PLLSEL_AIM_MASK 7
#define S6_GREG1_PLLSEL_DDR 8
#define S6_GREG1_PLLSEL_DDR_HS 0
#define S6_GREG1_PLLSEL_DDR_333MHZ 1
#define S6_GREG1_PLLSEL_DDR_250MHZ 2
#define S6_GREG1_PLLSEL_DDR_200MHZ 3
#define S6_GREG1_PLLSEL_DDR_167MHZ 4
#define S6_GREG1_PLLSEL_DDR_100MHZ 5
#define S6_GREG1_PLLSEL_DDR_33MHZ 6
#define S6_GREG1_PLLSEL_DDR_PLLIOREF 7
#define S6_GREG1_PLLSEL_DDR_MASK 7
#define S6_GREG1_PLLSEL_GMAC 16
#define S6_GREG1_PLLSEL_GMAC_125MHZ 0
#define S6_GREG1_PLLSEL_GMAC_25MHZ 1
#define S6_GREG1_PLLSEL_GMAC_2500KHZ 2
#define S6_GREG1_PLLSEL_GMAC_EXTERN 3
#define S6_GREG1_PLLSEL_GMAC_MASK 3
#define S6_GREG1_PLLSEL_GMII 18
#define S6_GREG1_PLLSEL_GMII_111MHZ 0
#define S6_GREG1_PLLSEL_GMII_IOREF 1
#define S6_GREG1_PLLSEL_GMII_NONE 2
#define S6_GREG1_PLLSEL_GMII_125MHZ 3
#define S6_GREG1_PLLSEL_GMII_MASK 3
#define S6_GREG1_SYSUNLOCKCNT 0x020
#define S6_GREG1_IOUNLOCKCNT 0x024
#define S6_GREG1_AIMUNLOCKCNT 0x028
#define S6_GREG1_DP0UNLOCKCNT 0x02C
#define S6_GREG1_DP2UNLOCKCNT 0x030
#define S6_GREG1_DDRUNLOCKCNT 0x034
#define S6_GREG1_CLKBAL0 0x040
#define S6_GREG1_CLKBAL0_LSGB 0
#define S6_GREG1_CLKBAL0_LSPX 8
#define S6_GREG1_CLKBAL0_MEMDO 16
#define S6_GREG1_CLKBAL0_HSXT1 24
#define S6_GREG1_CLKBAL1 0x044
#define S6_GREG1_CLKBAL1_HSISEF 0
#define S6_GREG1_CLKBAL1_HSNI 8
#define S6_GREG1_CLKBAL1_HSNS 16
#define S6_GREG1_CLKBAL1_HSISEFCFG 24
#define S6_GREG1_CLKBAL2 0x048
#define S6_GREG1_CLKBAL2_LSNB 0
#define S6_GREG1_CLKBAL2_LSSB 8
#define S6_GREG1_CLKBAL2_LSREST 24
#define S6_GREG1_CLKBAL3 0x04C
#define S6_GREG1_CLKBAL3_ISEFXAD 0
#define S6_GREG1_CLKBAL3_ISEFLMS 8
#define S6_GREG1_CLKBAL3_ISEFISEF 16
#define S6_GREG1_CLKBAL3_DDRDD 24
#define S6_GREG1_CLKBAL4 0x050
#define S6_GREG1_CLKBAL4_DDRDP 0
#define S6_GREG1_CLKBAL4_DDRDO 8
#define S6_GREG1_CLKBAL4_DDRNB 16
#define S6_GREG1_CLKBAL4_DDRLMS 24
#define S6_GREG1_BLOCKENA 0x100
#define S6_GREG1_BLOCK_DDR 0
#define S6_GREG1_BLOCK_DP 1
#define S6_GREG1_BLOCK_NSNI 2
#define S6_GREG1_BLOCK_PCIE 3
#define S6_GREG1_BLOCK_GMAC 4
#define S6_GREG1_BLOCK_I2S 5
#define S6_GREG1_BLOCK_EGIB 6
#define S6_GREG1_BLOCK_SB 7
#define S6_GREG1_BLOCK_XT1 8
#define S6_GREG1_CLKGATE 0x104
#define S6_GREG1_BGATE_AIMNORTH 9
#define S6_GREG1_BGATE_AIMEAST 10
#define S6_GREG1_BGATE_AIMWEST 11
#define S6_GREG1_BGATE_AIMSOUTH 12
#define S6_GREG1_CHIPRES 0x108
#define S6_GREG1_CHIPRES_SOFTRES 0
#define S6_GREG1_CHIPRES_LOSTLOCK 1
#define S6_GREG1_RESETCAUSE 0x10C
#define S6_GREG1_RESETCAUSE_RESETN 0
#define S6_GREG1_RESETCAUSE_GLOBAL 1
#define S6_GREG1_RESETCAUSE_WDOGTIMER 2
#define S6_GREG1_RESETCAUSE_SWCHIP 3
#define S6_GREG1_RESETCAUSE_PLLSYSLOSS 4
#define S6_GREG1_RESETCAUSE_PCIE 5
#define S6_GREG1_RESETCAUSE_CREATEDGLOB 6
#define S6_GREG1_REFCLOCKCNT 0x110
#define S6_GREG1_RESETTIMER 0x114
#define S6_GREG1_NMITIMER 0x118
#define S6_GREG1_GLOBAL_TIMER 0x11C
#define S6_GREG1_TIMER0 0x180
#define S6_GREG1_TIMER1 0x184
#define S6_GREG1_UARTCLOCKSEL 0x204
#define S6_GREG1_CHIPVERSPACKG 0x208
#define S6_GREG1_CHIPVERSPACKG_CHIPVID 0
#define S6_GREG1_CHIPVERSPACKG_PACKSEL 8
#define S6_GREG1_ONDIETERMCTRL 0x20C
#define S6_GREG1_ONDIETERMCTRL_WEST 0
#define S6_GREG1_ONDIETERMCTRL_NORTH 2
#define S6_GREG1_ONDIETERMCTRL_EAST 4
#define S6_GREG1_ONDIETERMCTRL_SOUTH 6
#define S6_GREG1_ONDIETERMCTRL_NONE 0
#define S6_GREG1_ONDIETERMCTRL_75OHM 2
#define S6_GREG1_ONDIETERMCTRL_MASK 3
#define S6_GREG1_BOOT_CFG0 0x210
#define S6_GREG1_BOOT_CFG0_AIMSTRONG 1
#define S6_GREG1_BOOT_CFG0_MINIBOOTDL 2
#define S6_GREG1_BOOT_CFG0_OCDGPIO8SET 5
#define S6_GREG1_BOOT_CFG0_OCDGPIOENA 6
#define S6_GREG1_BOOT_CFG0_DOWNSTREAM 7
#define S6_GREG1_BOOT_CFG0_PLLSYSDIV 8
#define S6_GREG1_BOOT_CFG0_PLLSYSDIV_300MHZ 1
#define S6_GREG1_BOOT_CFG0_PLLSYSDIV_240MHZ 2
#define S6_GREG1_BOOT_CFG0_PLLSYSDIV_200MHZ 3
#define S6_GREG1_BOOT_CFG0_PLLSYSDIV_150MHZ 4
#define S6_GREG1_BOOT_CFG0_PLLSYSDIV_120MHZ 5
#define S6_GREG1_BOOT_CFG0_PLLSYSDIV_40MHZ 6
#define S6_GREG1_BOOT_CFG0_PLLSYSDIV_MASK 7
#define S6_GREG1_BOOT_CFG0_BALHSLMS 12
#define S6_GREG1_BOOT_CFG0_BALHSNB 18
#define S6_GREG1_BOOT_CFG0_BALHSXAD 24
#define S6_GREG1_BOOT_CFG1 0x214
#define S6_GREG1_BOOT_CFG1_PCIE1LANE 1
#define S6_GREG1_BOOT_CFG1_MPLLPRESCALE 2
#define S6_GREG1_BOOT_CFG1_MPLLNCY 4
#define S6_GREG1_BOOT_CFG1_MPLLNCY5 9
#define S6_GREG1_BOOT_CFG1_BALHSREST 14
#define S6_GREG1_BOOT_CFG1_BALHSPSMEMS 20
#define S6_GREG1_BOOT_CFG1_BALLSGI 26
#define S6_GREG1_BOOT_CFG2 0x218
#define S6_GREG1_BOOT_CFG2_PEID 0
#define S6_GREG1_BOOT_CFG3 0x21C
#define S6_GREG1_DRAMBUSYHOLDOF 0x220
#define S6_GREG1_DRAMBUSYHOLDOF_XT0 0
#define S6_GREG1_DRAMBUSYHOLDOF_XT1 4
#define S6_GREG1_DRAMBUSYHOLDOF_XT_MASK 7
#define S6_GREG1_PCIEBAR1SIZE 0x224
#define S6_GREG1_PCIEBAR2SIZE 0x228
#define S6_GREG1_PCIEVENDOR 0x22C
#define S6_GREG1_PCIEDEVICE 0x230
#define S6_GREG1_PCIEREV 0x234
#define S6_GREG1_PCIECLASS 0x238
#define S6_GREG1_XT1DCACHEMISS 0x240
#define S6_GREG1_XT1ICACHEMISS 0x244
#define S6_GREG1_HWSEMAPHORE(n) (0x400 + 4 * (n))
#define S6_GREG1_HWSEMAPHORE_NB 16
/* peripheral interrupt numbers */
#define S6_INTC_GPIO(n) (n) /* 0..3 */
#define S6_INTC_I2C 4
#define S6_INTC_SPI 5
#define S6_INTC_NB_ERR 6
#define S6_INTC_DMA_LMSERR 7
#define S6_INTC_DMA_LMSLOWWMRK(n) (8 + (n)) /* 0..11 */
#define S6_INTC_DMA_LMSPENDCNT(n) (20 + (n)) /* 0..11 */
#define S6_INTC_DMA HOSTLOWWMRK(n) (32 + (n)) /* 0..6 */
#define S6_INTC_DMA_HOSTPENDCNT(n) (39 + (n)) /* 0..6 */
#define S6_INTC_DMA_HOSTERR 46
#define S6_INTC_UART(n) (47 + (n)) /* 0..1 */
#define S6_INTC_XAD 49
#define S6_INTC_NI_ERR 50
#define S6_INTC_NI_INFIFOFULL 51
#define S6_INTC_DMA_NIERR 52
#define S6_INTC_DMA_NILOWWMRK(n) (53 + (n)) /* 0..3 */
#define S6_INTC_DMA_NIPENDCNT(n) (57 + (n)) /* 0..3 */
#define S6_INTC_DDR 61
#define S6_INTC_NS_ERR 62
#define S6_INTC_EFI_CFGERR 63
#define S6_INTC_EFI_ISEFTEST 64
#define S6_INTC_EFI_WRITEERR 65
#define S6_INTC_NMI_TIMER 66
#define S6_INTC_PLLLOCK_SYS 67
#define S6_INTC_PLLLOCK_IO 68
#define S6_INTC_PLLLOCK_AIM 69
#define S6_INTC_PLLLOCK_DP0 70
#define S6_INTC_PLLLOCK_DP2 71
#define S6_INTC_I2S_ERR 72
#define S6_INTC_GMAC_STAT 73
#define S6_INTC_GMAC_ERR 74
#define S6_INTC_GIB_ERR 75
#define S6_INTC_PCIE_ERR 76
#define S6_INTC_PCIE_MSI(n) (77 + (n)) /* 0..3 */
#define S6_INTC_PCIE_INTA 81
#define S6_INTC_PCIE_INTB 82
#define S6_INTC_PCIE_INTC 83
#define S6_INTC_PCIE_INTD 84
#define S6_INTC_SW(n) (85 + (n)) /* 0..9 */
#define S6_INTC_SW_ENABLE(n) (85 + 256 + (n))
#define S6_INTC_DMA_DP_ERR 95
#define S6_INTC_DMA_DPLOWWMRK(n) (96 + (n)) /* 0..3 */
#define S6_INTC_DMA_DPPENDCNT(n) (100 + (n)) /* 0..3 */
#define S6_INTC_DMA_DPTERMCNT(n) (104 + (n)) /* 0..3 */
#define S6_INTC_TIMER0 108
#define S6_INTC_TIMER1 109
#define S6_INTC_DMA_HOSTTERMCNT(n) (110 + (n)) /* 0..6 */
#endif /* __XTENSA_S6000_HARDWARE_H */
#ifndef __XTENSA_S6000_IRQ_H
#define __XTENSA_S6000_IRQ_H
#define NO_IRQ (-1)
extern void variant_irq_enable(unsigned int irq);
extern void variant_irq_disable(unsigned int irq);
#endif /* __XTENSA_S6000_IRQ_H */
/*
* This header file contains assembly-language definitions (assembly
* macros, etc.) for this specific Xtensa processor's TIE extensions
* and options. It is customized to this Xtensa processor configuration.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1999-2008 Tensilica Inc.
*/
#ifndef _XTENSA_CORE_TIE_ASM_H
#define _XTENSA_CORE_TIE_ASM_H
/* Selection parameter values for save-area save/restore macros: */
/* Option vs. TIE: */
#define XTHAL_SAS_TIE 0x0001 /* custom extension or coprocessor */
#define XTHAL_SAS_OPT 0x0002 /* optional (and not a coprocessor) */
/* Whether used automatically by compiler: */
#define XTHAL_SAS_NOCC 0x0004 /* not used by compiler w/o special opts/code */
#define XTHAL_SAS_CC 0x0008 /* used by compiler without special opts/code */
/* ABI handling across function calls: */
#define XTHAL_SAS_CALR 0x0010 /* caller-saved */
#define XTHAL_SAS_CALE 0x0020 /* callee-saved */
#define XTHAL_SAS_GLOB 0x0040 /* global across function calls (in thread) */
/* Misc */
#define XTHAL_SAS_ALL 0xFFFF /* include all default NCP contents */
/* Macro to save all non-coprocessor (extra) custom TIE and optional state
* (not including zero-overhead loop registers).
* Save area ptr (clobbered): ptr (16 byte aligned)
* Scratch regs (clobbered): at1..at4 (only first XCHAL_NCP_NUM_ATMPS needed)
*/
.macro xchal_ncp_store ptr at1 at2 at3 at4 continue=0 ofs=-1 select=XTHAL_SAS_ALL
xchal_sa_start \continue, \ofs
.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
xchal_sa_align \ptr, 0, 1024-4, 4, 4
rsr \at1, BR // boolean option
s32i \at1, \ptr, .Lxchal_ofs_ + 0
.set .Lxchal_ofs_, .Lxchal_ofs_ + 4
.endif
.endm // xchal_ncp_store
/* Macro to save all non-coprocessor (extra) custom TIE and optional state
* (not including zero-overhead loop registers).
* Save area ptr (clobbered): ptr (16 byte aligned)
* Scratch regs (clobbered): at1..at4 (only first XCHAL_NCP_NUM_ATMPS needed)
*/
.macro xchal_ncp_load ptr at1 at2 at3 at4 continue=0 ofs=-1 select=XTHAL_SAS_ALL
xchal_sa_start \continue, \ofs
.ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
xchal_sa_align \ptr, 0, 1024-4, 4, 4
l32i \at1, \ptr, .Lxchal_ofs_ + 0
wsr \at1, BR // boolean option
.set .Lxchal_ofs_, .Lxchal_ofs_ + 4
.endif
.endm // xchal_ncp_load
#define XCHAL_NCP_NUM_ATMPS 1
/* Macro to save the state of TIE coprocessor FPU.
* Save area ptr (clobbered): ptr (16 byte aligned)
* Scratch regs (clobbered): at1..at4 (only first XCHAL_CP0_NUM_ATMPS needed)
*/
#define xchal_cp_FPU_store xchal_cp0_store
/* #define xchal_cp_FPU_store_a2 xchal_cp0_store a2 a3 a4 a5 a6 */
.macro xchal_cp0_store ptr at1 at2 at3 at4 continue=0 ofs=-1 select=XTHAL_SAS_ALL
xchal_sa_start \continue, \ofs
.ifeq (XTHAL_SAS_TIE | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
xchal_sa_align \ptr, 0, 0, 1, 16
rur232 \at1 // FCR
s32i \at1, \ptr, 0
rur233 \at1 // FSR
s32i \at1, \ptr, 4
SSI f0, \ptr, 8
SSI f1, \ptr, 12
SSI f2, \ptr, 16
SSI f3, \ptr, 20
SSI f4, \ptr, 24
SSI f5, \ptr, 28
SSI f6, \ptr, 32
SSI f7, \ptr, 36
SSI f8, \ptr, 40
SSI f9, \ptr, 44
SSI f10, \ptr, 48
SSI f11, \ptr, 52
SSI f12, \ptr, 56
SSI f13, \ptr, 60
SSI f14, \ptr, 64
SSI f15, \ptr, 68
.set .Lxchal_ofs_, .Lxchal_ofs_ + 72
.endif
.endm // xchal_cp0_store
/* Macro to restore the state of TIE coprocessor FPU.
* Save area ptr (clobbered): ptr (16 byte aligned)
* Scratch regs (clobbered): at1..at4 (only first XCHAL_CP0_NUM_ATMPS needed)
*/
#define xchal_cp_FPU_load xchal_cp0_load
/* #define xchal_cp_FPU_load_a2 xchal_cp0_load a2 a3 a4 a5 a6 */
.macro xchal_cp0_load ptr at1 at2 at3 at4 continue=0 ofs=-1 select=XTHAL_SAS_ALL
xchal_sa_start \continue, \ofs
.ifeq (XTHAL_SAS_TIE | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
xchal_sa_align \ptr, 0, 0, 1, 16
l32i \at1, \ptr, 0
wur232 \at1 // FCR
l32i \at1, \ptr, 4
wur233 \at1 // FSR
LSI f0, \ptr, 8
LSI f1, \ptr, 12
LSI f2, \ptr, 16
LSI f3, \ptr, 20
LSI f4, \ptr, 24
LSI f5, \ptr, 28
LSI f6, \ptr, 32
LSI f7, \ptr, 36
LSI f8, \ptr, 40
LSI f9, \ptr, 44
LSI f10, \ptr, 48
LSI f11, \ptr, 52
LSI f12, \ptr, 56
LSI f13, \ptr, 60
LSI f14, \ptr, 64
LSI f15, \ptr, 68
.set .Lxchal_ofs_, .Lxchal_ofs_ + 72
.endif
.endm // xchal_cp0_load
#define XCHAL_CP0_NUM_ATMPS 1
/* Macro to save the state of TIE coprocessor XAD.
* Save area ptr (clobbered): ptr (16 byte aligned)
* Scratch regs (clobbered): at1..at4 (only first XCHAL_CP6_NUM_ATMPS needed)
*/
#define xchal_cp_XAD_store xchal_cp6_store
/* #define xchal_cp_XAD_store_a2 xchal_cp6_store a2 a3 a4 a5 a6 */
.macro xchal_cp6_store ptr at1 at2 at3 at4 continue=0 ofs=-1 select=XTHAL_SAS_ALL
xchal_sa_start \continue, \ofs
.ifeq (XTHAL_SAS_TIE | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
xchal_sa_align \ptr, 0, 0, 1, 16
rur0 \at1 // LDCBHI
s32i \at1, \ptr, 0
rur1 \at1 // LDCBLO
s32i \at1, \ptr, 4
rur2 \at1 // STCBHI
s32i \at1, \ptr, 8
rur3 \at1 // STCBLO
s32i \at1, \ptr, 12
rur8 \at1 // LDBRBASE
s32i \at1, \ptr, 16
rur9 \at1 // LDBROFF
s32i \at1, \ptr, 20
rur10 \at1 // LDBRINC
s32i \at1, \ptr, 24
rur11 \at1 // STBRBASE
s32i \at1, \ptr, 28
rur12 \at1 // STBROFF
s32i \at1, \ptr, 32
rur13 \at1 // STBRINC
s32i \at1, \ptr, 36
rur24 \at1 // SCRATCH0
s32i \at1, \ptr, 40
rur25 \at1 // SCRATCH1
s32i \at1, \ptr, 44
rur26 \at1 // SCRATCH2
s32i \at1, \ptr, 48
rur27 \at1 // SCRATCH3
s32i \at1, \ptr, 52
WRAS128I wra0, \ptr, 64
WRAS128I wra1, \ptr, 80
WRAS128I wra2, \ptr, 96
WRAS128I wra3, \ptr, 112
WRAS128I wra4, \ptr, 128
WRAS128I wra5, \ptr, 144
WRAS128I wra6, \ptr, 160
WRAS128I wra7, \ptr, 176
WRAS128I wra8, \ptr, 192
WRAS128I wra9, \ptr, 208
WRAS128I wra10, \ptr, 224
WRAS128I wra11, \ptr, 240
WRAS128I wra12, \ptr, 256
WRAS128I wra13, \ptr, 272
WRAS128I wra14, \ptr, 288
WRAS128I wra15, \ptr, 304
WRBS128I wrb0, \ptr, 320
WRBS128I wrb1, \ptr, 336
WRBS128I wrb2, \ptr, 352
WRBS128I wrb3, \ptr, 368
WRBS128I wrb4, \ptr, 384
WRBS128I wrb5, \ptr, 400
WRBS128I wrb6, \ptr, 416
WRBS128I wrb7, \ptr, 432
WRBS128I wrb8, \ptr, 448
WRBS128I wrb9, \ptr, 464
WRBS128I wrb10, \ptr, 480
WRBS128I wrb11, \ptr, 496
WRBS128I wrb12, \ptr, 512
WRBS128I wrb13, \ptr, 528
WRBS128I wrb14, \ptr, 544
WRBS128I wrb15, \ptr, 560
.set .Lxchal_ofs_, .Lxchal_ofs_ + 576
.endif
.endm // xchal_cp6_store
/* Macro to restore the state of TIE coprocessor XAD.
* Save area ptr (clobbered): ptr (16 byte aligned)
* Scratch regs (clobbered): at1..at4 (only first XCHAL_CP6_NUM_ATMPS needed)
*/
#define xchal_cp_XAD_load xchal_cp6_load
/* #define xchal_cp_XAD_load_a2 xchal_cp6_load a2 a3 a4 a5 a6 */
.macro xchal_cp6_load ptr at1 at2 at3 at4 continue=0 ofs=-1 select=XTHAL_SAS_ALL
xchal_sa_start \continue, \ofs
.ifeq (XTHAL_SAS_TIE | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~\select
xchal_sa_align \ptr, 0, 0, 1, 16
l32i \at1, \ptr, 0
wur0 \at1 // LDCBHI
l32i \at1, \ptr, 4
wur1 \at1 // LDCBLO
l32i \at1, \ptr, 8
wur2 \at1 // STCBHI
l32i \at1, \ptr, 12
wur3 \at1 // STCBLO
l32i \at1, \ptr, 16
wur8 \at1 // LDBRBASE
l32i \at1, \ptr, 20
wur9 \at1 // LDBROFF
l32i \at1, \ptr, 24
wur10 \at1 // LDBRINC
l32i \at1, \ptr, 28
wur11 \at1 // STBRBASE
l32i \at1, \ptr, 32
wur12 \at1 // STBROFF
l32i \at1, \ptr, 36
wur13 \at1 // STBRINC
l32i \at1, \ptr, 40
wur24 \at1 // SCRATCH0
l32i \at1, \ptr, 44
wur25 \at1 // SCRATCH1
l32i \at1, \ptr, 48
wur26 \at1 // SCRATCH2
l32i \at1, \ptr, 52
wur27 \at1 // SCRATCH3
WRBL128I wrb0, \ptr, 320
WRBL128I wrb1, \ptr, 336
WRBL128I wrb2, \ptr, 352
WRBL128I wrb3, \ptr, 368
WRBL128I wrb4, \ptr, 384
WRBL128I wrb5, \ptr, 400
WRBL128I wrb6, \ptr, 416
WRBL128I wrb7, \ptr, 432
WRBL128I wrb8, \ptr, 448
WRBL128I wrb9, \ptr, 464
WRBL128I wrb10, \ptr, 480
WRBL128I wrb11, \ptr, 496
WRBL128I wrb12, \ptr, 512
WRBL128I wrb13, \ptr, 528
WRBL128I wrb14, \ptr, 544
WRBL128I wrb15, \ptr, 560
WRAL128I wra0, \ptr, 64
WRAL128I wra1, \ptr, 80
WRAL128I wra2, \ptr, 96
WRAL128I wra3, \ptr, 112
WRAL128I wra4, \ptr, 128
WRAL128I wra5, \ptr, 144
WRAL128I wra6, \ptr, 160
WRAL128I wra7, \ptr, 176
WRAL128I wra8, \ptr, 192
WRAL128I wra9, \ptr, 208
WRAL128I wra10, \ptr, 224
WRAL128I wra11, \ptr, 240
WRAL128I wra12, \ptr, 256
WRAL128I wra13, \ptr, 272
WRAL128I wra14, \ptr, 288
WRAL128I wra15, \ptr, 304
.set .Lxchal_ofs_, .Lxchal_ofs_ + 576
.endif
.endm // xchal_cp6_load
#define XCHAL_CP6_NUM_ATMPS 1
#define XCHAL_SA_NUM_ATMPS 1
/* Empty macros for unconfigured coprocessors: */
.macro xchal_cp1_store p a b c d continue=0 ofs=-1 select=-1 ; .endm
.macro xchal_cp1_load p a b c d continue=0 ofs=-1 select=-1 ; .endm
.macro xchal_cp2_store p a b c d continue=0 ofs=-1 select=-1 ; .endm
.macro xchal_cp2_load p a b c d continue=0 ofs=-1 select=-1 ; .endm
.macro xchal_cp3_store p a b c d continue=0 ofs=-1 select=-1 ; .endm
.macro xchal_cp3_load p a b c d continue=0 ofs=-1 select=-1 ; .endm
.macro xchal_cp4_store p a b c d continue=0 ofs=-1 select=-1 ; .endm
.macro xchal_cp4_load p a b c d continue=0 ofs=-1 select=-1 ; .endm
.macro xchal_cp5_store p a b c d continue=0 ofs=-1 select=-1 ; .endm
.macro xchal_cp5_load p a b c d continue=0 ofs=-1 select=-1 ; .endm
.macro xchal_cp7_store p a b c d continue=0 ofs=-1 select=-1 ; .endm
.macro xchal_cp7_load p a b c d continue=0 ofs=-1 select=-1 ; .endm
#endif /*_XTENSA_CORE_TIE_ASM_H*/
/*
* This header file describes this specific Xtensa processor's TIE extensions
* that extend basic Xtensa core functionality. It is customized to this
* Xtensa processor configuration.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1999-2008 Tensilica Inc.
*/
#ifndef _XTENSA_CORE_TIE_H
#define _XTENSA_CORE_TIE_H
#define XCHAL_CP_NUM 2 /* number of coprocessors */
#define XCHAL_CP_MAX 7 /* max CP ID + 1 (0 if none) */
#define XCHAL_CP_MASK 0x41 /* bitmask of all CPs by ID */
#define XCHAL_CP_PORT_MASK 0x00 /* bitmask of only port CPs */
/* Basic parameters of each coprocessor: */
#define XCHAL_CP0_NAME "FPU"
#define XCHAL_CP0_IDENT FPU
#define XCHAL_CP0_SA_SIZE 72 /* size of state save area */
#define XCHAL_CP0_SA_ALIGN 4 /* min alignment of save area */
#define XCHAL_CP_ID_FPU 0 /* coprocessor ID (0..7) */
#define XCHAL_CP6_NAME "XAD"
#define XCHAL_CP6_IDENT XAD
#define XCHAL_CP6_SA_SIZE 576 /* size of state save area */
#define XCHAL_CP6_SA_ALIGN 16 /* min alignment of save area */
#define XCHAL_CP_ID_XAD 6 /* coprocessor ID (0..7) */
/* Filler info for unassigned coprocessors, to simplify arrays etc: */
#define XCHAL_CP1_SA_SIZE 0
#define XCHAL_CP1_SA_ALIGN 1
#define XCHAL_CP2_SA_SIZE 0
#define XCHAL_CP2_SA_ALIGN 1
#define XCHAL_CP3_SA_SIZE 0
#define XCHAL_CP3_SA_ALIGN 1
#define XCHAL_CP4_SA_SIZE 0
#define XCHAL_CP4_SA_ALIGN 1
#define XCHAL_CP5_SA_SIZE 0
#define XCHAL_CP5_SA_ALIGN 1
#define XCHAL_CP7_SA_SIZE 0
#define XCHAL_CP7_SA_ALIGN 1
/* Save area for non-coprocessor optional and custom (TIE) state: */
#define XCHAL_NCP_SA_SIZE 4
#define XCHAL_NCP_SA_ALIGN 4
/* Total save area for optional and custom state (NCP + CPn): */
#define XCHAL_TOTAL_SA_SIZE 672 /* with 16-byte align padding */
#define XCHAL_TOTAL_SA_ALIGN 16 /* actual minimum alignment */
/*
* Detailed contents of save areas.
* NOTE: caller must define the XCHAL_SA_REG macro (not defined here)
* before expanding the XCHAL_xxx_SA_LIST() macros.
*
* XCHAL_SA_REG(s,ccused,abikind,kind,opt,name,galign,align,asize,
* dbnum,base,regnum,bitsz,gapsz,reset,x...)
*
* s = passed from XCHAL_*_LIST(s), eg. to select how to expand
* ccused = set if used by compiler without special options or code
* abikind = 0 (caller-saved), 1 (callee-saved), or 2 (thread-global)
* kind = 0 (special reg), 1 (TIE user reg), or 2 (TIE regfile reg)
* opt = 0 (custom TIE extension or coprocessor), or 1 (optional reg)
* name = lowercase reg name (no quotes)
* galign = group byte alignment (power of 2) (galign >= align)
* align = register byte alignment (power of 2)
* asize = allocated size in bytes (asize*8 == bitsz + gapsz + padsz)
* (not including any pad bytes required to galign this or next reg)
* dbnum = unique target number f/debug (see <xtensa-libdb-macros.h>)
* base = reg shortname w/o index (or sr=special, ur=TIE user reg)
* regnum = reg index in regfile, or special/TIE-user reg number
* bitsz = number of significant bits (regfile width, or ur/sr mask bits)
* gapsz = intervening bits, if bitsz bits not stored contiguously
* (padsz = pad bits at end [TIE regfile] or at msbits [ur,sr] of asize)
* reset = register reset value (or 0 if undefined at reset)
* x = reserved for future use (0 until then)
*
* To filter out certain registers, e.g. to expand only the non-global
* registers used by the compiler, you can do something like this:
*
* #define XCHAL_SA_REG(s,ccused,p...) SELCC##ccused(p)
* #define SELCC0(p...)
* #define SELCC1(abikind,p...) SELAK##abikind(p)
* #define SELAK0(p...) REG(p)
* #define SELAK1(p...) REG(p)
* #define SELAK2(p...)
* #define REG(kind,tie,name,galn,aln,asz,csz,dbnum,base,rnum,bsz,rst,x...) \
* ...what you want to expand...
*/
#define XCHAL_NCP_SA_NUM 1
#define XCHAL_NCP_SA_LIST(s) \
XCHAL_SA_REG(s,0,0,0,1, br, 4, 4, 4,0x0204, sr,4 , 16,0,0,0)
#define XCHAL_CP0_SA_NUM 18
#define XCHAL_CP0_SA_LIST(s) \
XCHAL_SA_REG(s,0,0,1,0, fcr, 4, 4, 4,0x03E8, ur,232, 32,0,0,0) \
XCHAL_SA_REG(s,0,0,1,0, fsr, 4, 4, 4,0x03E9, ur,233, 32,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, f0, 4, 4, 4,0x0030, f,0 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, f1, 4, 4, 4,0x0031, f,1 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, f2, 4, 4, 4,0x0032, f,2 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, f3, 4, 4, 4,0x0033, f,3 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, f4, 4, 4, 4,0x0034, f,4 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, f5, 4, 4, 4,0x0035, f,5 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, f6, 4, 4, 4,0x0036, f,6 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, f7, 4, 4, 4,0x0037, f,7 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, f8, 4, 4, 4,0x0038, f,8 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, f9, 4, 4, 4,0x0039, f,9 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, f10, 4, 4, 4,0x003A, f,10 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, f11, 4, 4, 4,0x003B, f,11 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, f12, 4, 4, 4,0x003C, f,12 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, f13, 4, 4, 4,0x003D, f,13 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, f14, 4, 4, 4,0x003E, f,14 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, f15, 4, 4, 4,0x003F, f,15 , 32,0,0,0)
#define XCHAL_CP1_SA_NUM 0
#define XCHAL_CP1_SA_LIST(s) /* empty */
#define XCHAL_CP2_SA_NUM 0
#define XCHAL_CP2_SA_LIST(s) /* empty */
#define XCHAL_CP3_SA_NUM 0
#define XCHAL_CP3_SA_LIST(s) /* empty */
#define XCHAL_CP4_SA_NUM 0
#define XCHAL_CP4_SA_LIST(s) /* empty */
#define XCHAL_CP5_SA_NUM 0
#define XCHAL_CP5_SA_LIST(s) /* empty */
#define XCHAL_CP6_SA_NUM 46
#define XCHAL_CP6_SA_LIST(s) \
XCHAL_SA_REG(s,0,0,1,0, ldcbhi,16, 4, 4,0x0300, ur,0 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,1,0, ldcblo, 4, 4, 4,0x0301, ur,1 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,1,0, stcbhi, 4, 4, 4,0x0302, ur,2 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,1,0, stcblo, 4, 4, 4,0x0303, ur,3 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,1,0, ldbrbase, 4, 4, 4,0x0308, ur,8 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,1,0, ldbroff, 4, 4, 4,0x0309, ur,9 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,1,0, ldbrinc, 4, 4, 4,0x030A, ur,10 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,1,0, stbrbase, 4, 4, 4,0x030B, ur,11 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,1,0, stbroff, 4, 4, 4,0x030C, ur,12 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,1,0, stbrinc, 4, 4, 4,0x030D, ur,13 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,1,0, scratch0, 4, 4, 4,0x0318, ur,24 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,1,0, scratch1, 4, 4, 4,0x0319, ur,25 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,1,0, scratch2, 4, 4, 4,0x031A, ur,26 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,1,0, scratch3, 4, 4, 4,0x031B, ur,27 , 32,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wra0,16,16,16,0x1010, wra,0 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wra1,16,16,16,0x1011, wra,1 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wra2,16,16,16,0x1012, wra,2 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wra3,16,16,16,0x1013, wra,3 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wra4,16,16,16,0x1014, wra,4 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wra5,16,16,16,0x1015, wra,5 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wra6,16,16,16,0x1016, wra,6 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wra7,16,16,16,0x1017, wra,7 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wra8,16,16,16,0x1018, wra,8 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wra9,16,16,16,0x1019, wra,9 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wra10,16,16,16,0x101A, wra,10 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wra11,16,16,16,0x101B, wra,11 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wra12,16,16,16,0x101C, wra,12 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wra13,16,16,16,0x101D, wra,13 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wra14,16,16,16,0x101E, wra,14 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wra15,16,16,16,0x101F, wra,15 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wrb0,16,16,16,0x1020, wrb,0 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wrb1,16,16,16,0x1021, wrb,1 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wrb2,16,16,16,0x1022, wrb,2 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wrb3,16,16,16,0x1023, wrb,3 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wrb4,16,16,16,0x1024, wrb,4 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wrb5,16,16,16,0x1025, wrb,5 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wrb6,16,16,16,0x1026, wrb,6 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wrb7,16,16,16,0x1027, wrb,7 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wrb8,16,16,16,0x1028, wrb,8 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wrb9,16,16,16,0x1029, wrb,9 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wrb10,16,16,16,0x102A, wrb,10 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wrb11,16,16,16,0x102B, wrb,11 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wrb12,16,16,16,0x102C, wrb,12 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wrb13,16,16,16,0x102D, wrb,13 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wrb14,16,16,16,0x102E, wrb,14 ,128,0,0,0) \
XCHAL_SA_REG(s,0,0,2,0, wrb15,16,16,16,0x102F, wrb,15 ,128,0,0,0)
#define XCHAL_CP7_SA_NUM 0
#define XCHAL_CP7_SA_LIST(s) /* empty */
/* Byte length of instruction from its first nibble (op0 field), per FLIX. */
#define XCHAL_OP0_FORMAT_LENGTHS 3,3,3,3,3,3,3,3,2,2,2,2,2,2,8,8
#endif /*_XTENSA_CORE_TIE_H*/
/*
* s6000 irq crossbar
*
* Copyright (c) 2009 emlix GmbH
* Authors: Johannes Weiner <jw@emlix.com>
* Oskar Schirmer <os@emlix.com>
*/
#include <linux/io.h>
#include <asm/irq.h>
#include <variant/hardware.h>
/* S6_REG_INTC */
#define INTC_STATUS 0x000
#define INTC_RAW 0x010
#define INTC_STATUS_AG 0x100
#define INTC_CFG(n) (0x200 + 4 * (n))
/*
* The s6000 has a crossbar that multiplexes interrupt output lines
* from the peripherals to input lines on the xtensa core.
*
* We leave the mapping decisions to the platform as it depends on the
* actually connected peripherals which distribution makes sense.
*/
extern const signed char *platform_irq_mappings[NR_IRQS];
static unsigned long scp_to_intc_enable[] = {
#define TO_INTC_ENABLE(n) (((n) << 1) + 1)
TO_INTC_ENABLE(0),
TO_INTC_ENABLE(1),
TO_INTC_ENABLE(2),
TO_INTC_ENABLE(3),
TO_INTC_ENABLE(4),
TO_INTC_ENABLE(5),
TO_INTC_ENABLE(6),
TO_INTC_ENABLE(7),
TO_INTC_ENABLE(8),
TO_INTC_ENABLE(9),
TO_INTC_ENABLE(10),
TO_INTC_ENABLE(11),
TO_INTC_ENABLE(12),
-1,
-1,
TO_INTC_ENABLE(13),
-1,
TO_INTC_ENABLE(14),
-1,
TO_INTC_ENABLE(15),
#undef TO_INTC_ENABLE
};
static void irq_set(unsigned int irq, int enable)
{
unsigned long en;
const signed char *m = platform_irq_mappings[irq];
if (!m)
return;
en = enable ? scp_to_intc_enable[irq] : 0;
while (*m >= 0) {
writel(en, S6_REG_INTC + INTC_CFG(*m));
m++;
}
}
void variant_irq_enable(unsigned int irq)
{
irq_set(irq, 1);
}
void variant_irq_disable(unsigned int irq)
{
irq_set(irq, 0);
}
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