Commit d4911cdd authored by Vineet Gupta's avatar Vineet Gupta

ARCv2: IOC: refactor the IOC and SLC operations into own functions

 - Move IOC setup into arc_ioc_setup()
 - Move SLC disabling into arc_slc_disable()
Signed-off-by: default avatarVineet Gupta <vgupta@synopsys.com>
parent eb1357d9
...@@ -92,8 +92,8 @@ extern unsigned long perip_base, perip_end; ...@@ -92,8 +92,8 @@ extern unsigned long perip_base, perip_end;
#define ARC_REG_SLC_RGN_END 0x916 #define ARC_REG_SLC_RGN_END 0x916
/* Bit val in SLC_CONTROL */ /* Bit val in SLC_CONTROL */
#define SLC_CTRL_DIS 0x001
#define SLC_CTRL_IM 0x040 #define SLC_CTRL_IM 0x040
#define SLC_CTRL_DISABLE 0x001
#define SLC_CTRL_BUSY 0x100 #define SLC_CTRL_BUSY 0x100
#define SLC_CTRL_RGN_OP_INV 0x200 #define SLC_CTRL_RGN_OP_INV 0x200
......
...@@ -601,6 +601,40 @@ noinline void slc_op(phys_addr_t paddr, unsigned long sz, const int op) ...@@ -601,6 +601,40 @@ noinline void slc_op(phys_addr_t paddr, unsigned long sz, const int op)
#endif #endif
} }
noinline static void slc_entire_op(const int op)
{
unsigned int ctrl, r = ARC_REG_SLC_CTRL;
ctrl = read_aux_reg(r);
if (!(op & OP_FLUSH)) /* i.e. OP_INV */
ctrl &= ~SLC_CTRL_IM; /* clear IM: Disable flush before Inv */
else
ctrl |= SLC_CTRL_IM;
write_aux_reg(r, ctrl);
write_aux_reg(ARC_REG_SLC_INVALIDATE, 1);
/* Important to wait for flush to complete */
while (read_aux_reg(r) & SLC_CTRL_BUSY);
}
static inline void arc_slc_disable(void)
{
const int r = ARC_REG_SLC_CTRL;
slc_entire_op(OP_FLUSH_N_INV);
write_aux_reg(r, read_aux_reg(r) | SLC_CTRL_DIS);
}
static inline void arc_slc_enable(void)
{
const int r = ARC_REG_SLC_CTRL;
write_aux_reg(r, read_aux_reg(r) & ~SLC_CTRL_DIS);
}
/*********************************************************** /***********************************************************
* Exported APIs * Exported APIs
*/ */
...@@ -927,6 +961,14 @@ SYSCALL_DEFINE3(cacheflush, uint32_t, start, uint32_t, sz, uint32_t, flags) ...@@ -927,6 +961,14 @@ SYSCALL_DEFINE3(cacheflush, uint32_t, start, uint32_t, sz, uint32_t, flags)
return 0; return 0;
} }
noinline void arc_ioc_setup(void)
{
write_aux_reg(ARC_REG_IO_COH_AP0_BASE, 0x80000);
write_aux_reg(ARC_REG_IO_COH_AP0_SIZE, 0x11);
write_aux_reg(ARC_REG_IO_COH_PARTIAL, 1);
write_aux_reg(ARC_REG_IO_COH_ENABLE, 1);
}
void arc_cache_init(void) void arc_cache_init(void)
{ {
unsigned int __maybe_unused cpu = smp_processor_id(); unsigned int __maybe_unused cpu = smp_processor_id();
...@@ -989,30 +1031,14 @@ void arc_cache_init(void) ...@@ -989,30 +1031,14 @@ void arc_cache_init(void)
} }
} }
if (is_isa_arcv2() && l2_line_sz && !slc_enable) { /* Note that SLC disable not formally supported till HS 3.0 */
if (is_isa_arcv2() && l2_line_sz && !slc_enable)
/* IM set : flush before invalidate */ arc_slc_disable();
write_aux_reg(ARC_REG_SLC_CTRL,
read_aux_reg(ARC_REG_SLC_CTRL) | SLC_CTRL_IM);
write_aux_reg(ARC_REG_SLC_INVALIDATE, 1); if (is_isa_arcv2() && ioc_enable)
arc_ioc_setup();
/* Important to wait for flush to complete */
while (read_aux_reg(ARC_REG_SLC_CTRL) & SLC_CTRL_BUSY);
write_aux_reg(ARC_REG_SLC_CTRL,
read_aux_reg(ARC_REG_SLC_CTRL) | SLC_CTRL_DISABLE);
}
if (is_isa_arcv2() && ioc_enable) { if (is_isa_arcv2() && ioc_enable) {
/* IO coherency base - 0x8z */
write_aux_reg(ARC_REG_IO_COH_AP0_BASE, 0x80000);
/* IO coherency aperture size - 512Mb: 0x8z-0xAz */
write_aux_reg(ARC_REG_IO_COH_AP0_SIZE, 0x11);
/* Enable partial writes */
write_aux_reg(ARC_REG_IO_COH_PARTIAL, 1);
/* Enable IO coherency */
write_aux_reg(ARC_REG_IO_COH_ENABLE, 1);
__dma_cache_wback_inv = __dma_cache_wback_inv_ioc; __dma_cache_wback_inv = __dma_cache_wback_inv_ioc;
__dma_cache_inv = __dma_cache_inv_ioc; __dma_cache_inv = __dma_cache_inv_ioc;
__dma_cache_wback = __dma_cache_wback_ioc; __dma_cache_wback = __dma_cache_wback_ioc;
......
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