mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 01:46:51 +07:00
82f6e266f8
Build failure was introduced by the commit identified below,
due to missed macro expension leading to wrong called function's name.
arch/powerpc/kernel/head_fsl_booke.o: In function `SystemCall':
arch/powerpc/kernel/head_fsl_booke.S:416: undefined reference to `kvmppc_handler_BOOKE_INTERRUPT_SYSCALL_SPRN_SRR1'
Makefile:1052: recipe for target 'vmlinux' failed
The called function should be kvmppc_handler_8_0x01B(). This patch fixes it.
Reported-by: Paul Mackerras <paulus@ozlabs.org>
Fixes: 1a4b739bbb ("powerpc/32: implement fast entry for syscalls on BOOKE")
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
536 lines
19 KiB
C
536 lines
19 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __HEAD_BOOKE_H__
|
|
#define __HEAD_BOOKE_H__
|
|
|
|
#include <asm/ptrace.h> /* for STACK_FRAME_REGS_MARKER */
|
|
#include <asm/kvm_asm.h>
|
|
#include <asm/kvm_booke_hv_asm.h>
|
|
|
|
#ifdef __ASSEMBLY__
|
|
|
|
/*
|
|
* Macros used for common Book-e exception handling
|
|
*/
|
|
|
|
#define SET_IVOR(vector_number, vector_label) \
|
|
li r26,vector_label@l; \
|
|
mtspr SPRN_IVOR##vector_number,r26; \
|
|
sync
|
|
|
|
#if (THREAD_SHIFT < 15)
|
|
#define ALLOC_STACK_FRAME(reg, val) \
|
|
addi reg,reg,val
|
|
#else
|
|
#define ALLOC_STACK_FRAME(reg, val) \
|
|
addis reg,reg,val@ha; \
|
|
addi reg,reg,val@l
|
|
#endif
|
|
|
|
/*
|
|
* Macro used to get to thread save registers.
|
|
* Note that entries 0-3 are used for the prolog code, and the remaining
|
|
* entries are available for specific exception use in the event a handler
|
|
* requires more than 4 scratch registers.
|
|
*/
|
|
#define THREAD_NORMSAVE(offset) (THREAD_NORMSAVES + (offset * 4))
|
|
|
|
#ifdef CONFIG_PPC_FSL_BOOK3E
|
|
#define BOOKE_CLEAR_BTB(reg) \
|
|
START_BTB_FLUSH_SECTION \
|
|
BTB_FLUSH(reg) \
|
|
END_BTB_FLUSH_SECTION
|
|
#else
|
|
#define BOOKE_CLEAR_BTB(reg)
|
|
#endif
|
|
|
|
|
|
#define NORMAL_EXCEPTION_PROLOG(intno) \
|
|
mtspr SPRN_SPRG_WSCRATCH0, r10; /* save one register */ \
|
|
mfspr r10, SPRN_SPRG_THREAD; \
|
|
stw r11, THREAD_NORMSAVE(0)(r10); \
|
|
stw r13, THREAD_NORMSAVE(2)(r10); \
|
|
mfcr r13; /* save CR in r13 for now */\
|
|
mfspr r11, SPRN_SRR1; \
|
|
DO_KVM BOOKE_INTERRUPT_##intno SPRN_SRR1; \
|
|
andi. r11, r11, MSR_PR; /* check whether user or kernel */\
|
|
mr r11, r1; \
|
|
beq 1f; \
|
|
BOOKE_CLEAR_BTB(r11) \
|
|
/* if from user, start at top of this thread's kernel stack */ \
|
|
lwz r11, TASK_STACK - THREAD(r10); \
|
|
ALLOC_STACK_FRAME(r11, THREAD_SIZE); \
|
|
1 : subi r11, r11, INT_FRAME_SIZE; /* Allocate exception frame */ \
|
|
stw r13, _CCR(r11); /* save various registers */ \
|
|
stw r12,GPR12(r11); \
|
|
stw r9,GPR9(r11); \
|
|
mfspr r13, SPRN_SPRG_RSCRATCH0; \
|
|
stw r13, GPR10(r11); \
|
|
lwz r12, THREAD_NORMSAVE(0)(r10); \
|
|
stw r12,GPR11(r11); \
|
|
lwz r13, THREAD_NORMSAVE(2)(r10); /* restore r13 */ \
|
|
mflr r10; \
|
|
stw r10,_LINK(r11); \
|
|
mfspr r12,SPRN_SRR0; \
|
|
stw r1, GPR1(r11); \
|
|
mfspr r9,SPRN_SRR1; \
|
|
stw r1, 0(r11); \
|
|
mr r1, r11; \
|
|
rlwinm r9,r9,0,14,12; /* clear MSR_WE (necessary?) */\
|
|
stw r0,GPR0(r11); \
|
|
lis r10, STACK_FRAME_REGS_MARKER@ha;/* exception frame marker */ \
|
|
addi r10, r10, STACK_FRAME_REGS_MARKER@l; \
|
|
stw r10, 8(r11); \
|
|
SAVE_4GPRS(3, r11); \
|
|
SAVE_2GPRS(7, r11)
|
|
|
|
.macro SYSCALL_ENTRY trapno intno srr1
|
|
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_\intno\()_\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 r10, TASK_CPU(r2)
|
|
slwi r10, r10, 3
|
|
add r11, r11, r10
|
|
#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.
|
|
*
|
|
* On 40x critical is the only additional level
|
|
* On 44x/e500 we have critical and machine check
|
|
* On e200 we have critical and debug (machine check occurs via critical)
|
|
*
|
|
* Additionally we reserve a SPRG for each priority level so we can free up a
|
|
* GPR to use as the base for indirect access to the exception stacks. This
|
|
* is necessary since the MMU is always on, for Book-E parts, and the stacks
|
|
* are offset from KERNELBASE.
|
|
*
|
|
* There is some space optimization to be had here if desired. However
|
|
* to allow for a common kernel with support for debug exceptions either
|
|
* going to critical or their own debug level we aren't currently
|
|
* providing configurations that micro-optimize space usage.
|
|
*/
|
|
|
|
#define MC_STACK_BASE mcheckirq_ctx
|
|
#define CRIT_STACK_BASE critirq_ctx
|
|
|
|
/* only on e500mc/e200 */
|
|
#define DBG_STACK_BASE dbgirq_ctx
|
|
|
|
#define EXC_LVL_FRAME_OVERHEAD (THREAD_SIZE - INT_FRAME_SIZE - EXC_LVL_SIZE)
|
|
|
|
#ifdef CONFIG_SMP
|
|
#define BOOKE_LOAD_EXC_LEVEL_STACK(level) \
|
|
mfspr r8,SPRN_PIR; \
|
|
slwi r8,r8,2; \
|
|
addis r8,r8,level##_STACK_BASE@ha; \
|
|
lwz r8,level##_STACK_BASE@l(r8); \
|
|
addi r8,r8,EXC_LVL_FRAME_OVERHEAD;
|
|
#else
|
|
#define BOOKE_LOAD_EXC_LEVEL_STACK(level) \
|
|
lis r8,level##_STACK_BASE@ha; \
|
|
lwz r8,level##_STACK_BASE@l(r8); \
|
|
addi r8,r8,EXC_LVL_FRAME_OVERHEAD;
|
|
#endif
|
|
|
|
/*
|
|
* Exception prolog for critical/machine check exceptions. This is a
|
|
* little different from the normal exception prolog above since a
|
|
* critical/machine check exception can potentially occur at any point
|
|
* during normal exception processing. Thus we cannot use the same SPRG
|
|
* registers as the normal prolog above. Instead we use a portion of the
|
|
* critical/machine check exception stack at low physical addresses.
|
|
*/
|
|
#define EXC_LEVEL_EXCEPTION_PROLOG(exc_level, intno, exc_level_srr0, exc_level_srr1) \
|
|
mtspr SPRN_SPRG_WSCRATCH_##exc_level,r8; \
|
|
BOOKE_LOAD_EXC_LEVEL_STACK(exc_level);/* r8 points to the exc_level stack*/ \
|
|
stw r9,GPR9(r8); /* save various registers */\
|
|
mfcr r9; /* save CR in r9 for now */\
|
|
stw r10,GPR10(r8); \
|
|
stw r11,GPR11(r8); \
|
|
stw r9,_CCR(r8); /* save CR on stack */\
|
|
mfspr r11,exc_level_srr1; /* check whether user or kernel */\
|
|
DO_KVM BOOKE_INTERRUPT_##intno exc_level_srr1; \
|
|
BOOKE_CLEAR_BTB(r10) \
|
|
andi. r11,r11,MSR_PR; \
|
|
mfspr r11,SPRN_SPRG_THREAD; /* if from user, start at top of */\
|
|
lwz r11, TASK_STACK - THREAD(r11); /* this thread's kernel stack */\
|
|
addi r11,r11,EXC_LVL_FRAME_OVERHEAD; /* allocate stack frame */\
|
|
beq 1f; \
|
|
/* COMING FROM USER MODE */ \
|
|
stw r9,_CCR(r11); /* save CR */\
|
|
lwz r10,GPR10(r8); /* copy regs from exception stack */\
|
|
lwz r9,GPR9(r8); \
|
|
stw r10,GPR10(r11); \
|
|
lwz r10,GPR11(r8); \
|
|
stw r9,GPR9(r11); \
|
|
stw r10,GPR11(r11); \
|
|
b 2f; \
|
|
/* COMING FROM PRIV MODE */ \
|
|
1: mr r11, r8; \
|
|
2: mfspr r8,SPRN_SPRG_RSCRATCH_##exc_level; \
|
|
stw r12,GPR12(r11); /* save various registers */\
|
|
mflr r10; \
|
|
stw r10,_LINK(r11); \
|
|
mfspr r12,SPRN_DEAR; /* save DEAR and ESR in the frame */\
|
|
stw r12,_DEAR(r11); /* since they may have had stuff */\
|
|
mfspr r9,SPRN_ESR; /* in them at the point where the */\
|
|
stw r9,_ESR(r11); /* exception was taken */\
|
|
mfspr r12,exc_level_srr0; \
|
|
stw r1,GPR1(r11); \
|
|
mfspr r9,exc_level_srr1; \
|
|
stw r1,0(r11); \
|
|
mr r1,r11; \
|
|
rlwinm r9,r9,0,14,12; /* clear MSR_WE (necessary?) */\
|
|
stw r0,GPR0(r11); \
|
|
SAVE_4GPRS(3, r11); \
|
|
SAVE_2GPRS(7, r11)
|
|
|
|
#define CRITICAL_EXCEPTION_PROLOG(intno) \
|
|
EXC_LEVEL_EXCEPTION_PROLOG(CRIT, intno, SPRN_CSRR0, SPRN_CSRR1)
|
|
#define DEBUG_EXCEPTION_PROLOG \
|
|
EXC_LEVEL_EXCEPTION_PROLOG(DBG, DEBUG, SPRN_DSRR0, SPRN_DSRR1)
|
|
#define MCHECK_EXCEPTION_PROLOG \
|
|
EXC_LEVEL_EXCEPTION_PROLOG(MC, MACHINE_CHECK, \
|
|
SPRN_MCSRR0, SPRN_MCSRR1)
|
|
|
|
/*
|
|
* Guest Doorbell -- this is a bit odd in that uses GSRR0/1 despite
|
|
* being delivered to the host. This exception can only happen
|
|
* inside a KVM guest -- so we just handle up to the DO_KVM rather
|
|
* than try to fit this into one of the existing prolog macros.
|
|
*/
|
|
#define GUEST_DOORBELL_EXCEPTION \
|
|
START_EXCEPTION(GuestDoorbell); \
|
|
mtspr SPRN_SPRG_WSCRATCH0, r10; /* save one register */ \
|
|
mfspr r10, SPRN_SPRG_THREAD; \
|
|
stw r11, THREAD_NORMSAVE(0)(r10); \
|
|
mfspr r11, SPRN_SRR1; \
|
|
stw r13, THREAD_NORMSAVE(2)(r10); \
|
|
mfcr r13; /* save CR in r13 for now */\
|
|
DO_KVM BOOKE_INTERRUPT_GUEST_DBELL SPRN_GSRR1; \
|
|
trap
|
|
|
|
/*
|
|
* Exception vectors.
|
|
*/
|
|
#define START_EXCEPTION(label) \
|
|
.align 5; \
|
|
label:
|
|
|
|
#define EXCEPTION(n, intno, label, hdlr, xfer) \
|
|
START_EXCEPTION(label); \
|
|
NORMAL_EXCEPTION_PROLOG(intno); \
|
|
addi r3,r1,STACK_FRAME_OVERHEAD; \
|
|
xfer(n, hdlr)
|
|
|
|
#define CRITICAL_EXCEPTION(n, intno, label, hdlr) \
|
|
START_EXCEPTION(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)), \
|
|
crit_transfer_to_handler, ret_from_crit_exc)
|
|
|
|
#define MCHECK_EXCEPTION(n, label, hdlr) \
|
|
START_EXCEPTION(label); \
|
|
MCHECK_EXCEPTION_PROLOG; \
|
|
mfspr r5,SPRN_ESR; \
|
|
stw r5,_ESR(r11); \
|
|
addi r3,r1,STACK_FRAME_OVERHEAD; \
|
|
EXC_XFER_TEMPLATE(hdlr, n+4, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), \
|
|
mcheck_transfer_to_handler, ret_from_mcheck_exc)
|
|
|
|
#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; \
|
|
bl tfer; \
|
|
.long hdlr; \
|
|
.long ret
|
|
|
|
#define EXC_XFER_STD(n, hdlr) \
|
|
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, transfer_to_handler, \
|
|
ret_from_except)
|
|
|
|
/* Check for a single step debug exception while in an exception
|
|
* handler before state has been saved. This is to catch the case
|
|
* where an instruction that we are trying to single step causes
|
|
* an exception (eg ITLB/DTLB miss) and thus the first instruction of
|
|
* the exception handler generates a single step debug exception.
|
|
*
|
|
* If we get a debug trap on the first instruction of an exception handler,
|
|
* we reset the MSR_DE in the _exception handler's_ MSR (the debug trap is
|
|
* a critical exception, so we are using SPRN_CSRR1 to manipulate the MSR).
|
|
* The exception handler was handling a non-critical interrupt, so it will
|
|
* save (and later restore) the MSR via SPRN_CSRR1, which will still have
|
|
* the MSR_DE bit set.
|
|
*/
|
|
#define DEBUG_DEBUG_EXCEPTION \
|
|
START_EXCEPTION(DebugDebug); \
|
|
DEBUG_EXCEPTION_PROLOG; \
|
|
\
|
|
/* \
|
|
* If there is a single step or branch-taken exception in an \
|
|
* exception entry sequence, it was probably meant to apply to \
|
|
* the code where the exception occurred (since exception entry \
|
|
* doesn't turn off DE automatically). We simulate the effect \
|
|
* of turning off DE on entry to an exception handler by turning \
|
|
* off DE in the DSRR1 value and clearing the debug status. \
|
|
*/ \
|
|
mfspr r10,SPRN_DBSR; /* check single-step/branch taken */ \
|
|
andis. r10,r10,(DBSR_IC|DBSR_BT)@h; \
|
|
beq+ 2f; \
|
|
\
|
|
lis r10,interrupt_base@h; /* check if exception in vectors */ \
|
|
ori r10,r10,interrupt_base@l; \
|
|
cmplw r12,r10; \
|
|
blt+ 2f; /* addr below exception vectors */ \
|
|
\
|
|
lis r10,interrupt_end@h; \
|
|
ori r10,r10,interrupt_end@l; \
|
|
cmplw r12,r10; \
|
|
bgt+ 2f; /* addr above exception vectors */ \
|
|
\
|
|
/* here it looks like we got an inappropriate debug exception. */ \
|
|
1: rlwinm r9,r9,0,~MSR_DE; /* clear DE in the CDRR1 value */ \
|
|
lis r10,(DBSR_IC|DBSR_BT)@h; /* clear the IC event */ \
|
|
mtspr SPRN_DBSR,r10; \
|
|
/* restore state and get out */ \
|
|
lwz r10,_CCR(r11); \
|
|
lwz r0,GPR0(r11); \
|
|
lwz r1,GPR1(r11); \
|
|
mtcrf 0x80,r10; \
|
|
mtspr SPRN_DSRR0,r12; \
|
|
mtspr SPRN_DSRR1,r9; \
|
|
lwz r9,GPR9(r11); \
|
|
lwz r12,GPR12(r11); \
|
|
mtspr SPRN_SPRG_WSCRATCH_DBG,r8; \
|
|
BOOKE_LOAD_EXC_LEVEL_STACK(DBG); /* r8 points to the debug stack */ \
|
|
lwz r10,GPR10(r8); \
|
|
lwz r11,GPR11(r8); \
|
|
mfspr r8,SPRN_SPRG_RSCRATCH_DBG; \
|
|
\
|
|
PPC_RFDI; \
|
|
b .; \
|
|
\
|
|
/* 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)), debug_transfer_to_handler, ret_from_debug_exc)
|
|
|
|
#define DEBUG_CRIT_EXCEPTION \
|
|
START_EXCEPTION(DebugCrit); \
|
|
CRITICAL_EXCEPTION_PROLOG(DEBUG); \
|
|
\
|
|
/* \
|
|
* If there is a single step or branch-taken exception in an \
|
|
* exception entry sequence, it was probably meant to apply to \
|
|
* the code where the exception occurred (since exception entry \
|
|
* doesn't turn off DE automatically). We simulate the effect \
|
|
* of turning off DE on entry to an exception handler by turning \
|
|
* off DE in the CSRR1 value and clearing the debug status. \
|
|
*/ \
|
|
mfspr r10,SPRN_DBSR; /* check single-step/branch taken */ \
|
|
andis. r10,r10,(DBSR_IC|DBSR_BT)@h; \
|
|
beq+ 2f; \
|
|
\
|
|
lis r10,interrupt_base@h; /* check if exception in vectors */ \
|
|
ori r10,r10,interrupt_base@l; \
|
|
cmplw r12,r10; \
|
|
blt+ 2f; /* addr below exception vectors */ \
|
|
\
|
|
lis r10,interrupt_end@h; \
|
|
ori r10,r10,interrupt_end@l; \
|
|
cmplw r12,r10; \
|
|
bgt+ 2f; /* addr above exception vectors */ \
|
|
\
|
|
/* here it looks like we got an inappropriate debug exception. */ \
|
|
1: rlwinm r9,r9,0,~MSR_DE; /* clear DE in the CSRR1 value */ \
|
|
lis r10,(DBSR_IC|DBSR_BT)@h; /* clear the IC event */ \
|
|
mtspr SPRN_DBSR,r10; \
|
|
/* restore state and get out */ \
|
|
lwz r10,_CCR(r11); \
|
|
lwz r0,GPR0(r11); \
|
|
lwz r1,GPR1(r11); \
|
|
mtcrf 0x80,r10; \
|
|
mtspr SPRN_CSRR0,r12; \
|
|
mtspr SPRN_CSRR1,r9; \
|
|
lwz r9,GPR9(r11); \
|
|
lwz r12,GPR12(r11); \
|
|
mtspr SPRN_SPRG_WSCRATCH_CRIT,r8; \
|
|
BOOKE_LOAD_EXC_LEVEL_STACK(CRIT); /* r8 points to the debug stack */ \
|
|
lwz r10,GPR10(r8); \
|
|
lwz r11,GPR11(r8); \
|
|
mfspr r8,SPRN_SPRG_RSCRATCH_CRIT; \
|
|
\
|
|
rfci; \
|
|
b .; \
|
|
\
|
|
/* 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)), crit_transfer_to_handler, ret_from_crit_exc)
|
|
|
|
#define DATA_STORAGE_EXCEPTION \
|
|
START_EXCEPTION(DataStorage) \
|
|
NORMAL_EXCEPTION_PROLOG(DATA_STORAGE); \
|
|
mfspr r5,SPRN_ESR; /* Grab the ESR and save it */ \
|
|
stw r5,_ESR(r11); \
|
|
mfspr r4,SPRN_DEAR; /* Grab the DEAR */ \
|
|
EXC_XFER_LITE(0x0300, handle_page_fault)
|
|
|
|
#define INSTRUCTION_STORAGE_EXCEPTION \
|
|
START_EXCEPTION(InstructionStorage) \
|
|
NORMAL_EXCEPTION_PROLOG(INST_STORAGE); \
|
|
mfspr r5,SPRN_ESR; /* Grab the ESR and save it */ \
|
|
stw r5,_ESR(r11); \
|
|
mr r4,r12; /* Pass SRR0 as arg2 */ \
|
|
li r5,0; /* Pass zero as arg3 */ \
|
|
EXC_XFER_LITE(0x0400, handle_page_fault)
|
|
|
|
#define ALIGNMENT_EXCEPTION \
|
|
START_EXCEPTION(Alignment) \
|
|
NORMAL_EXCEPTION_PROLOG(ALIGNMENT); \
|
|
mfspr r4,SPRN_DEAR; /* Grab the DEAR and save it */ \
|
|
stw r4,_DEAR(r11); \
|
|
addi r3,r1,STACK_FRAME_OVERHEAD; \
|
|
EXC_XFER_STD(0x0600, alignment_exception)
|
|
|
|
#define PROGRAM_EXCEPTION \
|
|
START_EXCEPTION(Program) \
|
|
NORMAL_EXCEPTION_PROLOG(PROGRAM); \
|
|
mfspr r4,SPRN_ESR; /* Grab the ESR and save it */ \
|
|
stw r4,_ESR(r11); \
|
|
addi r3,r1,STACK_FRAME_OVERHEAD; \
|
|
EXC_XFER_STD(0x0700, program_check_exception)
|
|
|
|
#define DECREMENTER_EXCEPTION \
|
|
START_EXCEPTION(Decrementer) \
|
|
NORMAL_EXCEPTION_PROLOG(DECREMENTER); \
|
|
lis r0,TSR_DIS@h; /* Setup the DEC interrupt mask */ \
|
|
mtspr SPRN_TSR,r0; /* Clear the DEC interrupt */ \
|
|
addi r3,r1,STACK_FRAME_OVERHEAD; \
|
|
EXC_XFER_LITE(0x0900, timer_interrupt)
|
|
|
|
#define FP_UNAVAILABLE_EXCEPTION \
|
|
START_EXCEPTION(FloatingPointUnavailable) \
|
|
NORMAL_EXCEPTION_PROLOG(FP_UNAVAIL); \
|
|
beq 1f; \
|
|
bl load_up_fpu; /* if from user, just load it up */ \
|
|
b fast_exception_return; \
|
|
1: addi r3,r1,STACK_FRAME_OVERHEAD; \
|
|
EXC_XFER_STD(0x800, kernel_fp_unavailable_exception)
|
|
|
|
#else /* __ASSEMBLY__ */
|
|
struct exception_regs {
|
|
unsigned long mas0;
|
|
unsigned long mas1;
|
|
unsigned long mas2;
|
|
unsigned long mas3;
|
|
unsigned long mas6;
|
|
unsigned long mas7;
|
|
unsigned long srr0;
|
|
unsigned long srr1;
|
|
unsigned long csrr0;
|
|
unsigned long csrr1;
|
|
unsigned long dsrr0;
|
|
unsigned long dsrr1;
|
|
unsigned long saved_ksp_limit;
|
|
};
|
|
|
|
/* ensure this structure is always sized to a multiple of the stack alignment */
|
|
#define STACK_EXC_LVL_FRAME_SIZE _ALIGN_UP(sizeof (struct exception_regs), 16)
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif /* __HEAD_BOOKE_H__ */
|