[PATCH] ppc32: 40x and Book E debug: 4xx platform support

This patch adds support to the 40x and 44x platform code for initializing
debug events and using the in-kernel kgdb stub.
Signed-off-by: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/ppc/platforms/4xx/Kconfig

@@ -201,7 +201,7 @@ config PPC4xx_EDMA
 
 config PPC_GEN550
 	bool
-	depends on 44x
+	depends on 4xx
 	default y
 
 config PM

arch/ppc/platforms/4xx/ebony.c

@@ -313,14 +313,6 @@ ebony_setup_arch(void)
 	struct ocp_def *def;
 	struct ocp_func_emac_data *emacdata;
 
-#if !defined(CONFIG_BDI_SWITCH)
-	/*
-	 * The Abatron BDI JTAG debugger does not tolerate others
-	 * mucking with the debug registers.
-	 */
-        mtspr(SPRN_DBCR0, (DBCR0_TDE | DBCR0_IDM));
-#endif
-
 	/* Set mac_addr for each EMAC */
 	vpd_base = ioremap64(EBONY_VPD_BASE, EBONY_VPD_SIZE);
 	def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, 0);

arch/ppc/platforms/4xx/ocotea.c

@@ -291,14 +291,6 @@ ocotea_setup_arch(void)
 
 	ibm440gx_tah_enable();
 
-#if !defined(CONFIG_BDI_SWITCH)
-	/*
-	 * The Abatron BDI JTAG debugger does not tolerate others
-	 * mucking with the debug registers.
-	 */
-        mtspr(SPRN_DBCR0, (DBCR0_TDE | DBCR0_IDM));
-#endif
-
 	/* Setup TODC access */
 	TODC_INIT(TODC_TYPE_DS1743,
 			0,

arch/ppc/syslib/Makefile

@@ -25,7 +25,6 @@ obj-$(CONFIG_GEN_RTC)		+= todc_time.o
 obj-$(CONFIG_PPC4xx_DMA)	+= ppc4xx_dma.o
 obj-$(CONFIG_PPC4xx_EDMA)	+= ppc4xx_sgdma.o
 ifeq ($(CONFIG_40x),y)
-obj-$(CONFIG_KGDB)		+= ppc4xx_kgdb.o
 obj-$(CONFIG_PCI)		+= indirect_pci.o pci_auto.o ppc405_pci.o
 endif
 endif

arch/ppc/syslib/ibm44x_common.c

@@ -166,5 +166,17 @@ void __init ibm44x_platform_init(void)
 #ifdef CONFIG_KGDB
 	ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
 #endif
+
+	/*
+	 * The Abatron BDI JTAG debugger does not tolerate others
+	 * mucking with the debug registers.
+	 */
+#if !defined(CONFIG_BDI_SWITCH)
+	/* Enable internal debug mode */
+        mtspr(SPRN_DBCR0, (DBCR0_IDM));
+
+	/* Clear any residual debug events */
+	mtspr(SPRN_DBSR, 0xffffffff);
+#endif
 }
 

arch/ppc/syslib/ppc4xx_setup.c

@@ -42,6 +42,8 @@
 #include <asm/pci-bridge.h>
 #include <asm/bootinfo.h>
 
+#include <syslib/gen550.h>
+
 /* Function Prototypes */
 extern void abort(void);
 extern void ppc4xx_find_bridges(void);
@@ -56,8 +58,16 @@ bd_t __res;
 void __init
 ppc4xx_setup_arch(void)
 {
-	/* Setup PCI host bridges */
+#if !defined(CONFIG_BDI_SWITCH)
+	/*
+	 * The Abatron BDI JTAG debugger does not tolerate others
+	 * mucking with the debug registers.
+	 */
+        mtspr(SPRN_DBCR0, (DBCR0_IDM));
+	mtspr(SPRN_DBSR, 0xffffffff);
+#endif
 
+	/* Setup PCI host bridges */
 #ifdef CONFIG_PCI
 	ppc4xx_find_bridges();
 #endif
@@ -189,38 +199,6 @@ ppc4xx_calibrate_decr(void)
 	/* Set the PIT reload value and just let it run. */
 	mtspr(SPRN_PIT, tb_ticks_per_jiffy);
 }
-#ifdef CONFIG_SERIAL_TEXT_DEBUG
-
-#ifdef SERIAL_DEBUG_IO_BASE
-/* We assume that the UART has already been initialized by the
-   firmware or the boot loader */
-static void
-serial_putc(u8 * com_port, unsigned char c)
-{
-	while ((readb(com_port + (UART_LSR)) & UART_LSR_THRE) == 0) ;
-	writeb(c, com_port);
-}
-
-static void
-ppc4xx_progress(char *s, unsigned short hex)
-{
-	char c;
-	u8 *com_port = (u8 *) SERIAL_DEBUG_IO_BASE;
-
-	while ((c = *s++) != '\0') {
-		serial_putc(com_port, c);
-	}
-	serial_putc(com_port, '\r');
-	serial_putc(com_port, '\n');
-}
-#else
-static void
-ppc4xx_progress(char *s, unsigned short hex)
-{
-	printk("%s\r\n", s);
-}
-#endif
-#endif				/* CONFIG_SERIAL_TEXT_DEBUG */
 
 /*
  * IDE stuff.
@@ -323,13 +301,9 @@ ppc4xx_init(unsigned long r3, unsigned long r4, unsigned long r5,
 	ppc_md.setup_io_mappings = ppc4xx_map_io;
 
 #ifdef CONFIG_SERIAL_TEXT_DEBUG
-	ppc_md.progress = ppc4xx_progress;
+	ppc_md.progress = gen550_progress;
 #endif
 
-/*
-**   m8xx_setup.c, prep_setup.c use
-**     defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
-*/
 #if defined(CONFIG_PCI) && defined(CONFIG_IDE)
 	ppc_ide_md.ide_init_hwif = ppc4xx_ide_init_hwif_ports;
 #endif /* defined(CONFIG_PCI) && defined(CONFIG_IDE) */