From efa35cf12d914d4caba942acd5a6c45f217de302 Mon Sep 17 00:00:00 2001 From: Grzegorz Bernacki Date: Fri, 15 Jun 2007 11:19:28 +0200 Subject: ppc4xx: Clean up 440 exceptions handling - Introduced dedicated switches for building 440 and 405 images required for 440-specific machine instructions like 'rfmci' etc. - Exception vectors moved to the proper location (_start moved away from the critical exception handler space, which it occupied) - CriticalInput now serviced (with default handler) - MachineCheck properly serviced (added a dedicated handler and return subroutine) - Overall cleanup of exceptions declared with STD_EXCEPTION macro (unused, unhandled and those not relevant for 4xx were eliminated) - Eliminated Linux leftovers, removed dead code Signed-off-by: Grzegorz Bernacki Signed-off-by: Rafal Jaworowski Signed-off-by: Stefan Roese --- include/ppc_asm.tmpl | 96 +++++++++++++++++++++------------------------------- 1 file changed, 39 insertions(+), 57 deletions(-) (limited to 'include/ppc_asm.tmpl') 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); \ @@ -248,41 +250,6 @@ * r21, r22 (SRR0), and r23 (SRR1). */ -/* - * 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. * @@ -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__ */ -- cgit From 83b4cfa3d629dff0264366263c5e94d9a50ad80b Mon Sep 17 00:00:00 2001 From: Wolfgang Denk Date: Wed, 20 Jun 2007 18:14:24 +0200 Subject: Coding style cleanup. Refresh CHANGELOG. --- include/ppc_asm.tmpl | 52 ++++++++++++++++++++++++++-------------------------- 1 file changed, 26 insertions(+), 26 deletions(-) (limited to 'include/ppc_asm.tmpl') diff --git a/include/ppc_asm.tmpl b/include/ppc_asm.tmpl index f15628aa2e..ad027d61f4 100644 --- a/include/ppc_asm.tmpl +++ b/include/ppc_asm.tmpl @@ -113,11 +113,11 @@ #if defined(CONFIG_5xx) /* Some special purpose registers */ -#define DER 149 /* Debug Enable Register */ -#define COUNTA 150 /* Breakpoint Counter */ -#define COUNTB 151 /* Breakpoint Counter */ -#define LCTRL1 156 /* Load/Store Support */ -#define LCTRL2 157 /* Load/Store Support */ +#define DER 149 /* Debug Enable Register */ +#define COUNTA 150 /* Breakpoint Counter */ +#define COUNTB 151 /* Breakpoint Counter */ +#define LCTRL1 156 /* Load/Store Support */ +#define LCTRL2 157 /* Load/Store Support */ #define ICTRL 158 /* I-Bus Support Control Register */ #define EID 81 #endif /* CONFIG_5xx */ @@ -266,39 +266,39 @@ label: \ addi r3,r1,STACK_FRAME_OVERHEAD; \ li r20,MSR_KERNEL; \ rlwimi r20,r23,0,25,25; \ - blrl; \ + blrl; \ .L_ ## label : \ .long hdlr - _start + _START_OFFSET; \ .long int_return - _start + _START_OFFSET #define CRIT_EXCEPTION(n, label, hdlr) \ - . = n; \ + . = 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; \ + 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 + .long hdlr - _start + _START_OFFSET; \ + .long crit_return - _start + _START_OFFSET #ifdef CONFIG_440 #define MCK_EXCEPTION(n, label, hdlr) \ - . = n; \ + . = 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; \ + 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 + .long hdlr - _start + _START_OFFSET; \ + .long mck_return - _start + _START_OFFSET #endif /* CONFIG_440 */ #endif /* __PPC_ASM_TMPL__ */ -- cgit From 02032e8f14751a1a751b09240a4f1cf9f8a2077f Mon Sep 17 00:00:00 2001 From: Rafal Jaworowski Date: Fri, 22 Jun 2007 14:58:04 +0200 Subject: [ppc] Fix build breakage for all non-4xx PowerPC variants. - adapt to the more generic EXCEPTION_PROLOG and CRIT_EXCEPTION macros - minor 4xx cleanup --- include/ppc_asm.tmpl | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/ppc_asm.tmpl') diff --git a/include/ppc_asm.tmpl b/include/ppc_asm.tmpl index ad027d61f4..9f4029f2af 100644 --- a/include/ppc_asm.tmpl +++ b/include/ppc_asm.tmpl @@ -274,7 +274,7 @@ label: \ #define CRIT_EXCEPTION(n, label, hdlr) \ . = n; \ label: \ - EXCEPTION_PROLOG(csrr0, csrr1); \ + EXCEPTION_PROLOG(CSRR0, CSRR1); \ lwz r3,GOT(transfer_to_handler); \ mtlr r3; \ addi r3,r1,STACK_FRAME_OVERHEAD; \ -- cgit