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Diffstat (limited to 'arch/powerpc/kernel/head_booke.h')
-rw-r--r--arch/powerpc/kernel/head_booke.h131
1 files changed, 107 insertions, 24 deletions
diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h
index 1b22a8dea399..bfeb469e8106 100644
--- a/arch/powerpc/kernel/head_booke.h
+++ b/arch/powerpc/kernel/head_booke.h
@@ -6,6 +6,8 @@
#include <asm/kvm_asm.h>
#include <asm/kvm_booke_hv_asm.h>
+#ifdef __ASSEMBLY__
+
/*
* Macros used for common Book-e exception handling
*/
@@ -81,6 +83,101 @@ END_BTB_FLUSH_SECTION
SAVE_4GPRS(3, r11); \
SAVE_2GPRS(7, r11)
+.macro SYSCALL_ENTRY trapno intno
+ mfspr r10, SPRN_SPRG_THREAD
+#ifdef CONFIG_KVM_BOOKE_HV
+BEGIN_FTR_SECTION
+ mtspr SPRN_SPRG_WSCRATCH0, r10
+ stw r11, THREAD_NORMSAVE(0)(r10)
+ stw r13, THREAD_NORMSAVE(2)(r10)
+ mfcr r13 /* save CR in r13 for now */
+ mfspr r11, SPRN_SRR1
+ mtocrf 0x80, r11 /* check MSR[GS] without clobbering reg */
+ bf 3, 1975f
+ b kvmppc_handler_BOOKE_INTERRUPT_\intno\()_SPRN_SRR1
+1975:
+ mr r12, r13
+ lwz r13, THREAD_NORMSAVE(2)(r10)
+FTR_SECTION_ELSE
+#endif
+ mfcr r12
+#ifdef CONFIG_KVM_BOOKE_HV
+ALT_FTR_SECTION_END_IFSET(CPU_FTR_EMB_HV)
+#endif
+ BOOKE_CLEAR_BTB(r11)
+ lwz r11, TASK_STACK - THREAD(r10)
+ rlwinm r12,r12,0,4,2 /* Clear SO bit in CR */
+ ALLOC_STACK_FRAME(r11, THREAD_SIZE - INT_FRAME_SIZE)
+ stw r12, _CCR(r11) /* save various registers */
+ mflr r12
+ stw r12,_LINK(r11)
+ mfspr r12,SPRN_SRR0
+ stw r1, GPR1(r11)
+ mfspr r9,SPRN_SRR1
+ stw r1, 0(r11)
+ mr r1, r11
+ stw r12,_NIP(r11)
+ rlwinm r9,r9,0,14,12 /* clear MSR_WE (necessary?) */
+ lis r12, STACK_FRAME_REGS_MARKER@ha /* exception frame marker */
+ stw r2,GPR2(r11)
+ addi r12, r12, STACK_FRAME_REGS_MARKER@l
+ stw r9,_MSR(r11)
+ li r2, \trapno + 1
+ stw r12, 8(r11)
+ stw r2,_TRAP(r11)
+ SAVE_GPR(0, r11)
+ SAVE_4GPRS(3, r11)
+ SAVE_2GPRS(7, r11)
+
+ addi r11,r1,STACK_FRAME_OVERHEAD
+ addi r2,r10,-THREAD
+ stw r11,PT_REGS(r10)
+ /* Check to see if the dbcr0 register is set up to debug. Use the
+ internal debug mode bit to do this. */
+ lwz r12,THREAD_DBCR0(r10)
+ andis. r12,r12,DBCR0_IDM@h
+ ACCOUNT_CPU_USER_ENTRY(r2, r11, r12)
+ beq+ 3f
+ /* From user and task is ptraced - load up global dbcr0 */
+ li r12,-1 /* clear all pending debug events */
+ mtspr SPRN_DBSR,r12
+ lis r11,global_dbcr0@ha
+ tophys(r11,r11)
+ addi r11,r11,global_dbcr0@l
+#ifdef CONFIG_SMP
+ lwz r9,TASK_CPU(r2)
+ slwi r9,r9,3
+ add r11,r11,r9
+#endif
+ lwz r12,0(r11)
+ mtspr SPRN_DBCR0,r12
+ lwz r12,4(r11)
+ addi r12,r12,-1
+ stw r12,4(r11)
+
+3:
+ tovirt(r2, r2) /* set r2 to current */
+ lis r11, transfer_to_syscall@h
+ ori r11, r11, transfer_to_syscall@l
+#ifdef CONFIG_TRACE_IRQFLAGS
+ /*
+ * If MSR is changing we need to keep interrupts disabled at this point
+ * otherwise we might risk taking an interrupt before we tell lockdep
+ * they are enabled.
+ */
+ lis r10, MSR_KERNEL@h
+ ori r10, r10, MSR_KERNEL@l
+ rlwimi r10, r9, 0, MSR_EE
+#else
+ lis r10, (MSR_KERNEL | MSR_EE)@h
+ ori r10, r10, (MSR_KERNEL | MSR_EE)@l
+#endif
+ mtspr SPRN_SRR1,r10
+ mtspr SPRN_SRR0,r11
+ SYNC
+ RFI /* jump to handler, enable MMU */
+.endm
+
/* To handle the additional exception priority levels on 40x and Book-E
* processors we allocate a stack per additional priority level.
*
@@ -217,8 +314,7 @@ label:
CRITICAL_EXCEPTION_PROLOG(intno); \
addi r3,r1,STACK_FRAME_OVERHEAD; \
EXC_XFER_TEMPLATE(hdlr, n+2, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), \
- NOCOPY, crit_transfer_to_handler, \
- ret_from_crit_exc)
+ crit_transfer_to_handler, ret_from_crit_exc)
#define MCHECK_EXCEPTION(n, label, hdlr) \
START_EXCEPTION(label); \
@@ -227,36 +323,23 @@ label:
stw r5,_ESR(r11); \
addi r3,r1,STACK_FRAME_OVERHEAD; \
EXC_XFER_TEMPLATE(hdlr, n+4, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), \
- NOCOPY, mcheck_transfer_to_handler, \
- ret_from_mcheck_exc)
+ mcheck_transfer_to_handler, ret_from_mcheck_exc)
-#define EXC_XFER_TEMPLATE(hdlr, trap, msr, copyee, tfer, ret) \
+#define EXC_XFER_TEMPLATE(hdlr, trap, msr, tfer, ret) \
li r10,trap; \
stw r10,_TRAP(r11); \
lis r10,msr@h; \
ori r10,r10,msr@l; \
- copyee(r10, r9); \
bl tfer; \
.long hdlr; \
.long ret
-#define COPY_EE(d, s) rlwimi d,s,0,16,16
-#define NOCOPY(d, s)
-
#define EXC_XFER_STD(n, hdlr) \
- EXC_XFER_TEMPLATE(hdlr, n, MSR_KERNEL, NOCOPY, transfer_to_handler_full, \
+ EXC_XFER_TEMPLATE(hdlr, n, MSR_KERNEL, transfer_to_handler_full, \
ret_from_except_full)
#define EXC_XFER_LITE(n, hdlr) \
- EXC_XFER_TEMPLATE(hdlr, n+1, MSR_KERNEL, NOCOPY, transfer_to_handler, \
- ret_from_except)
-
-#define EXC_XFER_EE(n, hdlr) \
- EXC_XFER_TEMPLATE(hdlr, n, MSR_KERNEL, COPY_EE, transfer_to_handler_full, \
- ret_from_except_full)
-
-#define EXC_XFER_EE_LITE(n, hdlr) \
- EXC_XFER_TEMPLATE(hdlr, n+1, MSR_KERNEL, COPY_EE, transfer_to_handler, \
+ EXC_XFER_TEMPLATE(hdlr, n+1, MSR_KERNEL, transfer_to_handler, \
ret_from_except)
/* Check for a single step debug exception while in an exception
@@ -323,7 +406,7 @@ label:
/* continue normal handling for a debug exception... */ \
2: mfspr r4,SPRN_DBSR; \
addi r3,r1,STACK_FRAME_OVERHEAD; \
- EXC_XFER_TEMPLATE(DebugException, 0x2008, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), NOCOPY, debug_transfer_to_handler, ret_from_debug_exc)
+ EXC_XFER_TEMPLATE(DebugException, 0x2008, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), debug_transfer_to_handler, ret_from_debug_exc)
#define DEBUG_CRIT_EXCEPTION \
START_EXCEPTION(DebugCrit); \
@@ -376,7 +459,7 @@ label:
/* continue normal handling for a critical exception... */ \
2: mfspr r4,SPRN_DBSR; \
addi r3,r1,STACK_FRAME_OVERHEAD; \
- EXC_XFER_TEMPLATE(DebugException, 0x2002, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), NOCOPY, crit_transfer_to_handler, ret_from_crit_exc)
+ EXC_XFER_TEMPLATE(DebugException, 0x2002, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), crit_transfer_to_handler, ret_from_crit_exc)
#define DATA_STORAGE_EXCEPTION \
START_EXCEPTION(DataStorage) \
@@ -401,7 +484,7 @@ label:
mfspr r4,SPRN_DEAR; /* Grab the DEAR and save it */ \
stw r4,_DEAR(r11); \
addi r3,r1,STACK_FRAME_OVERHEAD; \
- EXC_XFER_EE(0x0600, alignment_exception)
+ EXC_XFER_STD(0x0600, alignment_exception)
#define PROGRAM_EXCEPTION \
START_EXCEPTION(Program) \
@@ -426,9 +509,9 @@ label:
bl load_up_fpu; /* if from user, just load it up */ \
b fast_exception_return; \
1: addi r3,r1,STACK_FRAME_OVERHEAD; \
- EXC_XFER_EE_LITE(0x800, kernel_fp_unavailable_exception)
+ EXC_XFER_STD(0x800, kernel_fp_unavailable_exception)
-#ifndef __ASSEMBLY__
+#else /* __ASSEMBLY__ */
struct exception_regs {
unsigned long mas0;
unsigned long mas1;
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-10 09:23:11 +0300