Merge with /home/stefan/git/u-boot/denx-440-exceptions

18 files changed, 77 insertions, 63 deletions

diff --git a/include/asm-ppc/processor.h b/include/asm-ppc/processor.h
index 5efc3ee2ca..29e6101a15 100644
--- a/include/asm-ppc/processor.h
+++ b/include/asm-ppc/processor.h
@@ -308,7 +308,7 @@
 #define SPRN_SRR0	0x01A	/* Save/Restore Register 0 */
 #define SPRN_SRR1	0x01B	/* Save/Restore Register 1 */
 #define SPRN_SRR2	0x3DE	/* Save/Restore Register 2 */
-#define SPRN_SRR3 	0x3DF	/* Save/Restore Register 3 */
+#define SPRN_SRR3	0x3DF	/* Save/Restore Register 3 */
 #ifdef CONFIG_BOOKE
 #define SPRN_SVR	0x3FF	/* System Version Register */
 #else
@@ -451,6 +451,17 @@
 #define SPRN_PID1       0x279   /* Process ID Register 1 */
 #define SPRN_PID2       0x27a   /* Process ID Register 2 */
 #define SPRN_MCSR	0x23c	/* Machine Check Syndrome register */
+#ifdef CONFIG_440
+#define MCSR_MCS	0x80000000	/* Machine Check Summary */
+#define MCSR_IB		0x40000000	/* Instruction PLB Error */
+#define MCSR_DRB	0x20000000	/* Data Read PLB Error */
+#define MCSR_DWB	0x10000000	/* Data Write PLB Error */
+#define MCSR_TLBP	0x08000000	/* TLB Parity Error */
+#define MCSR_ICP	0x04000000	/* I-Cache Parity Error */
+#define MCSR_DCSP	0x02000000	/* D-Cache Search Parity Error */
+#define MCSR_DCFP	0x01000000	/* D-Cache Flush Parity Error */
+#define MCSR_IMPE	0x00800000	/* Imprecise Machine Check Exception */
+#endif
 #define ESR_ST          0x00800000      /* Store Operation */
 
 #if defined(CONFIG_MPC86xx)
@@ -544,6 +555,8 @@
 #define SPRG7   SPRN_SPRG7
 #define SRR0	SPRN_SRR0	/* Save and Restore Register 0 */
 #define SRR1	SPRN_SRR1	/* Save and Restore Register 1 */
+#define SRR2	SPRN_SRR2	/* Save and Restore Register 2 */
+#define SRR3	SPRN_SRR3	/* Save and Restore Register 3 */
 #define SVR	SPRN_SVR	/* System Version Register */
 #define TBRL	SPRN_TBRL	/* Time Base Read Lower Register */
 #define TBRU	SPRN_TBRU	/* Time Base Read Upper Register */
diff --git a/include/configs/CPCI440.h b/include/configs/CPCI440.h
index 90d3a8d8fa..7b5f72836e 100644
--- a/include/configs/CPCI440.h
+++ b/include/configs/CPCI440.h
@@ -33,6 +33,7 @@
  *----------------------------------------------------------------------*/
 #define CONFIG_CPCI440		1	    /* Board is ebony		*/
 #define CONFIG_440GP		1	    /* Specifc GP support	*/
+#define CONFIG_440		1	    /* ... PPC440 family	*/
 #define CONFIG_4xx		1	    /* ... PPC4xx family	*/
 #define CONFIG_BOARD_EARLY_INIT_F 1	    /* Call board_early_init_f	*/
 #undef	CFG_DRAM_TEST			    /* Disable-takes long time! */
diff --git a/include/configs/KAREF.h b/include/configs/KAREF.h
index 2ad6f06985..fd9bd31627 100644
--- a/include/configs/KAREF.h
+++ b/include/configs/KAREF.h
@@ -38,6 +38,7 @@
  *----------------------------------------------------------------------*/
 #define CONFIG_KAREF	     1		/* Board is Kamino Ref Variant */
 #define CONFIG_440GX		  1	     /* Specifc GX support	*/
+#define CONFIG_440		  1	     /* ... PPC440 family	*/
 #define CONFIG_4xx		  1	     /* ... PPC4xx family	*/
 #define CONFIG_BOARD_EARLY_INIT_F 1	     /* Call board_pre_init	*/
 #define CONFIG_MISC_INIT_F	  1	     /* Call board misc_init_f	*/
diff --git a/include/configs/METROBOX.h b/include/configs/METROBOX.h
index 465a4ecb8b..148fe9a5c3 100644
--- a/include/configs/METROBOX.h
+++ b/include/configs/METROBOX.h
@@ -104,6 +104,7 @@
  *----------------------------------------------------------------------*/
 #define CONFIG_METROBOX		  1	     /* Board is Metrobox	*/
 #define CONFIG_440GX		  1	     /* Specifc GX support	*/
+#define CONFIG_440		  1	     /* ... PPC440 family	*/
 #define CONFIG_4xx		  1	     /* ... PPC4xx family	*/
 #define CONFIG_BOARD_EARLY_INIT_F 1	     /* Call board_pre_init	*/
 #define CONFIG_MISC_INIT_F	  1	     /* Call board misc_init_f	*/
diff --git a/include/configs/alpr.h b/include/configs/alpr.h
index 67f62d3dfb..47893e824d 100644
--- a/include/configs/alpr.h
+++ b/include/configs/alpr.h
@@ -29,6 +29,7 @@
  *----------------------------------------------------------------------*/
 #define CONFIG_ALPR		1	    /* Board is ebony		*/
 #define CONFIG_440GX		1	    /* Specifc GX support	*/
+#define CONFIG_440		1	    /* ... PPC440 family	*/
 #define CONFIG_4xx		1	    /* ... PPC4xx family	*/
 #define CONFIG_BOARD_EARLY_INIT_F 1	    /* Call board_pre_init	*/
 #define CONFIG_LAST_STAGE_INIT	1	    /* call last_stage_init()	*/
diff --git a/include/configs/bamboo.h b/include/configs/bamboo.h
index 763d1c7a8b..af337eee8e 100644
--- a/include/configs/bamboo.h
+++ b/include/configs/bamboo.h
@@ -32,6 +32,7 @@
  *----------------------------------------------------------------------*/
 #define CONFIG_BAMBOO		1	/* Board is BAMBOO              */
 #define CONFIG_440EP		1	/* Specific PPC440EP support    */
+#define CONFIG_440		1	/* ... PPC440 family	        */
 #define CONFIG_4xx		1	/* ... PPC4xx family	        */
 #define CONFIG_SYS_CLK_FREQ	33333333    /* external freq to pll	*/
 
diff --git a/include/configs/ebony.h b/include/configs/ebony.h
index a42319b097..5bd326b9ae 100644
--- a/include/configs/ebony.h
+++ b/include/configs/ebony.h
@@ -32,6 +32,7 @@
  *----------------------------------------------------------------------*/
 #define CONFIG_EBONY		1	    /* Board is ebony		*/
 #define CONFIG_440GP		1	    /* Specifc GP support	*/
+#define CONFIG_440		1	    /* ... PPC440 family	*/
 #define CONFIG_4xx		1	    /* ... PPC4xx family	*/
 #define CONFIG_BOARD_EARLY_INIT_F 1	    /* Call board_early_init_f	*/
 #undef	CFG_DRAM_TEST			    /* Disable-takes long time! */
diff --git a/include/configs/katmai.h b/include/configs/katmai.h
index cc47a168ed..e6ebe3815d 100644
--- a/include/configs/katmai.h
+++ b/include/configs/katmai.h
@@ -29,7 +29,7 @@
 
 #ifndef __CONFIG_H
 #define __CONFIG_H
-
+//#define DEBUG
 /*-----------------------------------------------------------------------
  * High Level Configuration Options
  *----------------------------------------------------------------------*/
diff --git a/include/configs/ocotea.h b/include/configs/ocotea.h
index fe4e63810e..31f8bb3fdd 100644
--- a/include/configs/ocotea.h
+++ b/include/configs/ocotea.h
@@ -41,6 +41,7 @@
  *----------------------------------------------------------------------*/
 #define CONFIG_OCOTEA		1	    /* Board is ebony		*/
 #define CONFIG_440GX		1	    /* Specifc GX support	*/
+#define CONFIG_440		1	    /* ... PPC440 family	*/
 #define CONFIG_4xx		1	    /* ... PPC4xx family	*/
 #define CONFIG_BOARD_EARLY_INIT_F 1	    /* Call board_pre_init	*/
 #undef	CFG_DRAM_TEST			    /* Disable-takes long time! */
diff --git a/include/configs/p3p440.h b/include/configs/p3p440.h
index aa0901f3ff..cae5bd56f8 100644
--- a/include/configs/p3p440.h
+++ b/include/configs/p3p440.h
@@ -35,6 +35,7 @@
  *----------------------------------------------------------------------*/
 #define CONFIG_P3P440		1	    /* Board is P3P440		*/
 #define CONFIG_440GP		1	    /* Specifc GP support	*/
+#define CONFIG_440		1	    /* ... PPC440 family	*/
 #define CONFIG_4xx		1	    /* ... PPC4xx family	*/
 #define CONFIG_BOARD_EARLY_INIT_F 1	    /* Call board_early_init_f	*/
 #define CONFIG_MISC_INIT_R	1	    /* Call misc_init_r		*/
diff --git a/include/configs/pcs440ep.h b/include/configs/pcs440ep.h
index 9e41773f57..040e589597 100644
--- a/include/configs/pcs440ep.h
+++ b/include/configs/pcs440ep.h
@@ -32,6 +32,7 @@
  *----------------------------------------------------------------------*/
 #define CONFIG_PCS440EP		1	/* Board is PCS440EP            */
 #define CONFIG_440EP		1	/* Specific PPC440EP support    */
+#define CONFIG_440		1	/* ... PPC440 family	        */
 #define CONFIG_4xx		1	/* ... PPC4xx family	        */
 #define CONFIG_SYS_CLK_FREQ	33333333    /* external freq to pll	*/
 
diff --git a/include/configs/sequoia.h b/include/configs/sequoia.h
index 23243a4971..42b42fc57f 100644
--- a/include/configs/sequoia.h
+++ b/include/configs/sequoia.h
@@ -37,6 +37,7 @@
 #else
 #define CONFIG_440GRX		1		/* Specific PPC440GRx	*/
 #endif
+#define CONFIG_440		1		/* ... PPC440 family	*/
 #define CONFIG_4xx		1		/* ... PPC4xx family	*/
 /* Detect Sequoia PLL input clock automatically via CPLD bit		*/
 #define CONFIG_SYS_CLK_FREQ    ((in8(CFG_BCSR_BASE + 3) & 0x80) ? \
diff --git a/include/configs/taishan.h b/include/configs/taishan.h
index 2b28f93a07..cbbb0066e9 100644
--- a/include/configs/taishan.h
+++ b/include/configs/taishan.h
@@ -30,6 +30,7 @@
  *----------------------------------------------------------------------*/
 #define CONFIG_TAISHAN		1	/* Board is taishan		*/
 #define CONFIG_440GX		1	/* Specifc GX support		*/
+#define CONFIG_440		1	/* ... PPC440 family		*/
 #define CONFIG_4xx		1	/* ... PPC4xx family		*/
 #undef	CFG_DRAM_TEST			/* Disable-takes long time!	*/
 #define CONFIG_SYS_CLK_FREQ	33333333 /* external freq to pll	*/
diff --git a/include/configs/yosemite.h b/include/configs/yosemite.h
index b68ae54b94..c96b14e839 100644
--- a/include/configs/yosemite.h
+++ b/include/configs/yosemite.h
@@ -38,6 +38,7 @@
 #define CONFIG_440GR		1	/* Specific PPC440GR support	*/
 #define CONFIG_HOSTNAME		yellowstone
 #endif
+#define CONFIG_440		1	/* ... PPC440 family		*/
 #define CONFIG_4xx		1	/* ... PPC4xx family		*/
 #define CONFIG_SYS_CLK_FREQ	66666666    /* external freq to pll	*/
 
diff --git a/include/ppc405.h b/include/ppc405.h
index 71ad12e515..6be2a50db7 100644
--- a/include/ppc405.h
+++ b/include/ppc405.h
@@ -27,6 +27,15 @@
 /*--------------------------------------------------------------------- */
 	#define  srr2  0x3de      /* save/restore register 2 */
 	#define  srr3  0x3df      /* save/restore register 3 */
+
+	/*
+	 * 405 does not really have CSRR0/1 but SRR2/3 are used during critical
+	 * exception for the exact same purposes - let's alias them and have a
+	 * common handling in crit_return() and CRIT_EXCEPTION
+	 */
+	#define  csrr0 srr2
+	#define  csrr1 srr3
+
 	#define  dbsr  0x3f0      /* debug status register */
 	#define  dbcr0 0x3f2      /* debug control register 0 */
 	#define  dbcr1 0x3bd      /* debug control register 1 */
diff --git a/include/ppc440.h b/include/ppc440.h
index a7efcee7e9..09f843041d 100644
--- a/include/ppc440.h
+++ b/include/ppc440.h
@@ -82,10 +82,7 @@
 #define	 ivor13 0x19d	/* interrupt vector offset register 13 */
 #define	 ivor14 0x19e	/* interrupt vector offset register 14 */
 #define	 ivor15 0x19f	/* interrupt vector offset register 15 */
-#if defined(CONFIG_440GX) || \
-    defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
-    defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
-    defined(CONFIG_440SP) || defined(CONFIG_440SPE)
+#if defined(CONFIG_440)
 #define	 mcsrr0 0x23a	/* machine check save/restore register 0 */
 #define	 mcsrr1 0x23b	/* mahcine check save/restore register 1 */
 #define	 mcsr	0x23c	/* machine check status register */
diff --git a/include/ppc4xx.h b/include/ppc4xx.h
index 67759c7336..8cead66ad1 100644
--- a/include/ppc4xx.h
+++ b/include/ppc4xx.h
@@ -22,6 +22,7 @@
 #ifndef	__PPC4XX_H__
 #define __PPC4XX_H__
 
+#define _START_OFFSET 0x2100
 
 #if defined(CONFIG_440)
 #include <ppc440.h>
diff --git a/include/ppc_asm.tmpl b/include/ppc_asm.tmpl
index 3e47e82aba..f15628aa2e 100644
--- a/include/ppc_asm.tmpl
+++ b/include/ppc_asm.tmpl
@@ -217,7 +217,7 @@
  * We assume sprg3 has the physical address of the current
  * task's thread_struct.
  */
-#define EXCEPTION_PROLOG	\
+#define EXCEPTION_PROLOG(reg1, reg2)	\
 	mtspr	SPRG0,r20;	\
 	mtspr	SPRG1,r21;	\
 	mfcr	r20;		\
@@ -235,8 +235,10 @@
 	stw	r22,_CTR(r21);	\
 	mfspr	r20,XER;	\
 	stw	r20,_XER(r21);	\
-	mfspr	r22,SRR0;	\
-	mfspr	r23,SRR1;	\
+	mfspr	r20,DEAR;	\
+	stw	r20,_DAR(r21);	\
+	mfspr	r22,reg1;	\
+	mfspr	r23,reg2;	\
 	stw	r0,GPR0(r21);	\
 	stw	r1,GPR1(r21);	\
 	stw	r2,GPR2(r21);	\
@@ -249,41 +251,6 @@
  */
 
 /*
- * Critical exception entry code.  This is just like the other exception
- * code except that it uses SRR2 and SRR3 instead of SRR0 and SRR1.
- */
-#define CRITICAL_EXCEPTION_PROLOG       \
-	mtspr   SPRG0,r20;      \
-	mtspr   SPRG1,r21;      \
-	mfcr    r20;            \
-	subi    r21,r1,INT_FRAME_SIZE+STACK_UNDERHEAD;  /* alloc exc. frame */\
-	stw     r20,_CCR(r21);          /* save registers */ \
-	stw     r22,GPR22(r21); \
-	stw     r23,GPR23(r21); \
-	mfspr   r20,SPRG0;      \
-	stw     r20,GPR20(r21); \
-	mfspr   r22,SPRG1;      \
-	stw     r22,GPR21(r21); \
-	mflr    r20;            \
-	stw     r20,_LINK(r21); \
-	mfctr   r22;            \
-	stw     r22,_CTR(r21);  \
-	mfspr   r20,XER;        \
-	stw     r20,_XER(r21);  \
-	mfspr   r22,990;        /* SRR2 */      \
-	mfspr   r23,991;        /* SRR3 */      \
-	stw     r0,GPR0(r21);   \
-	stw     r1,GPR1(r21);   \
-	stw     r2,GPR2(r21);   \
-	stw     r1,0(r21);      \
-	mr      r1,r21;                 /* set new kernel sp */ \
-	SAVE_4GPRS(3, r21);
-/*
- * Note: code which follows this uses cr0.eq (set if from kernel),
- * r21, r22 (SRR2), and r23 (SRR3).
- */
-
-/*
  * Exception vectors.
  *
  * The data words for `hdlr' and `int_return' are initialized with
@@ -293,30 +260,45 @@
 #define STD_EXCEPTION(n, label, hdlr)			\
 	. = n;						\
 label:							\
-	EXCEPTION_PROLOG;				\
+	EXCEPTION_PROLOG(SRR0, SRR1);			\
 	lwz	r3,GOT(transfer_to_handler);		\
 	mtlr	r3;					\
 	addi	r3,r1,STACK_FRAME_OVERHEAD;		\
 	li	r20,MSR_KERNEL;				\
 	rlwimi	r20,r23,0,25,25;			\
-	blrl	; 					\
+	blrl;	 					\
 .L_ ## label :						\
-	.long	hdlr - _start + EXC_OFF_SYS_RESET;	\
-	.long	int_return - _start + EXC_OFF_SYS_RESET
-
-
-#define CRIT_EXCEPTION(n, label, hdlr)                  \
-	. = n;                                          \
-label:                                                  \
-	CRITICAL_EXCEPTION_PROLOG;                      \
-	lwz     r3,GOT(transfer_to_handler);            \
-	mtlr    r3;                                     \
-	addi    r3,r1,STACK_FRAME_OVERHEAD;             \
-	li      r20,(MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)); \
-	rlwimi  r20,r23,0,25,25;                        \
-	blrl    ;                                       \
-.L_ ## label :                                          \
-	.long   hdlr - _start + EXC_OFF_SYS_RESET;      \
-	.long   crit_return - _start + EXC_OFF_SYS_RESET
+	.long	hdlr - _start + _START_OFFSET;		\
+	.long	int_return - _start + _START_OFFSET
+
+#define CRIT_EXCEPTION(n, label, hdlr)				\
+        . = n;							\
+label:								\
+        EXCEPTION_PROLOG(csrr0, csrr1);				\
+        lwz     r3,GOT(transfer_to_handler);			\
+        mtlr    r3;						\
+        addi    r3,r1,STACK_FRAME_OVERHEAD;			\
+        li      r20,(MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE));	\
+        rlwimi  r20,r23,0,25,25;				\
+        blrl;							\
+.L_ ## label :							\
+        .long   hdlr - _start + _START_OFFSET;			\
+        .long   crit_return - _start + _START_OFFSET
+
+#ifdef CONFIG_440
+#define MCK_EXCEPTION(n, label, hdlr)				\
+        . = n;							\
+label:								\
+        EXCEPTION_PROLOG(MCSRR0, MCSRR1);			\
+        lwz     r3,GOT(transfer_to_handler);			\
+        mtlr    r3;						\
+        addi    r3,r1,STACK_FRAME_OVERHEAD;			\
+        li      r20,(MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE));	\
+        rlwimi  r20,r23,0,25,25;				\
+        blrl;							\
+.L_ ## label :							\
+        .long   hdlr - _start + _START_OFFSET;			\
+        .long   mck_return - _start + _START_OFFSET
+#endif /* CONFIG_440  */
 
 #endif	/* __PPC_ASM_TMPL__ */