#include <asm/reg.h>
#include <asm/page.h>
#include <asm/mmu.h>
-#include <asm/systemcfg.h>
#include <asm/ppc_asm.h>
#include <asm/asm-offsets.h>
#include <asm/bug.h>
bne 100b
#ifdef CONFIG_HMT
- b .hmt_init
+ LOADADDR(r4, .hmt_init)
+ mtctr r4
+ bctr
#else
#ifdef CONFIG_SMP
+ LOADADDR(r4, .pSeries_secondary_smp_init)
+ mtctr r4
mr r3,r24
- b .pSeries_secondary_smp_init
+ bctr
#else
BUG_OPCODE
#endif
#define EX_R12 24
#define EX_R13 32
#define EX_SRR0 40
-#define EX_R3 40 /* SLB miss saves R3, but not SRR0 */
#define EX_DAR 48
-#define EX_LR 48 /* SLB miss saves LR, but not DAR */
#define EX_DSISR 56
#define EX_CCR 60
+#define EX_R3 64
+#define EX_LR 72
+
+/*
+ * We're short on space and time in the exception prolog, so we can't use
+ * the normal LOADADDR macro. Normally we just need the low halfword of the
+ * address, but for Kdump we need the whole low word.
+ */
+#ifdef CONFIG_CRASH_DUMP
+#define LOAD_HANDLER(reg, label) \
+ oris reg,reg,(label)@h; /* virt addr of handler ... */ \
+ ori reg,reg,(label)@l; /* .. and the rest */
+#else
+#define LOAD_HANDLER(reg, label) \
+ ori reg,reg,(label)@l; /* virt addr of handler ... */
+#endif
#define EXCEPTION_PROLOG_PSERIES(area, label) \
mfspr r13,SPRN_SPRG3; /* get paca address into r13 */ \
clrrdi r12,r13,32; /* get high part of &label */ \
mfmsr r10; \
mfspr r11,SPRN_SRR0; /* save SRR0 */ \
- ori r12,r12,(label)@l; /* virt addr of handler */ \
+ LOAD_HANDLER(r12,label) \
ori r10,r10,MSR_IR|MSR_DR|MSR_RI; \
mtspr SPRN_SRR0,r12; \
mfspr r12,SPRN_SRR1; /* and SRR1 */ \
mtspr SPRN_SPRG1,r13
RUNLATCH_ON(r13)
mfspr r13,SPRN_SPRG3 /* get paca address into r13 */
+ std r3,PACA_EXSLB+EX_R3(r13)
+ mfspr r3,SPRN_DAR
std r9,PACA_EXSLB+EX_R9(r13) /* save r9 - r12 */
+ mfcr r9
+#ifdef __DISABLED__
+ /* Keep that around for when we re-implement dynamic VSIDs */
+ cmpdi r3,0
+ bge slb_miss_user_pseries
+#endif /* __DISABLED__ */
std r10,PACA_EXSLB+EX_R10(r13)
std r11,PACA_EXSLB+EX_R11(r13)
std r12,PACA_EXSLB+EX_R12(r13)
- std r3,PACA_EXSLB+EX_R3(r13)
- mfspr r9,SPRN_SPRG1
- std r9,PACA_EXSLB+EX_R13(r13)
- mfcr r9
+ mfspr r10,SPRN_SPRG1
+ std r10,PACA_EXSLB+EX_R13(r13)
mfspr r12,SPRN_SRR1 /* and SRR1 */
- mfspr r3,SPRN_DAR
- b .do_slb_miss /* Rel. branch works in real mode */
+ b .slb_miss_realmode /* Rel. branch works in real mode */
STD_EXCEPTION_PSERIES(0x400, instruction_access)
mtspr SPRN_SPRG1,r13
RUNLATCH_ON(r13)
mfspr r13,SPRN_SPRG3 /* get paca address into r13 */
+ std r3,PACA_EXSLB+EX_R3(r13)
+ mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */
std r9,PACA_EXSLB+EX_R9(r13) /* save r9 - r12 */
+ mfcr r9
+#ifdef __DISABLED__
+ /* Keep that around for when we re-implement dynamic VSIDs */
+ cmpdi r3,0
+ bge slb_miss_user_pseries
+#endif /* __DISABLED__ */
std r10,PACA_EXSLB+EX_R10(r13)
std r11,PACA_EXSLB+EX_R11(r13)
std r12,PACA_EXSLB+EX_R12(r13)
- std r3,PACA_EXSLB+EX_R3(r13)
- mfspr r9,SPRN_SPRG1
- std r9,PACA_EXSLB+EX_R13(r13)
- mfcr r9
+ mfspr r10,SPRN_SPRG1
+ std r10,PACA_EXSLB+EX_R13(r13)
mfspr r12,SPRN_SRR1 /* and SRR1 */
- mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */
- b .do_slb_miss /* Rel. branch works in real mode */
+ b .slb_miss_realmode /* Rel. branch works in real mode */
STD_EXCEPTION_PSERIES(0x500, hardware_interrupt)
STD_EXCEPTION_PSERIES(0x600, alignment)
mfspr r12,SPRN_SPRG2
EXCEPTION_PROLOG_PSERIES(PACA_EXSLB, .do_stab_bolted)
+/*
+ * We have some room here we use that to put
+ * the peries slb miss user trampoline code so it's reasonably
+ * away from slb_miss_user_common to avoid problems with rfid
+ *
+ * This is used for when the SLB miss handler has to go virtual,
+ * which doesn't happen for now anymore but will once we re-implement
+ * dynamic VSIDs for shared page tables
+ */
+#ifdef __DISABLED__
+slb_miss_user_pseries:
+ std r10,PACA_EXGEN+EX_R10(r13)
+ std r11,PACA_EXGEN+EX_R11(r13)
+ std r12,PACA_EXGEN+EX_R12(r13)
+ mfspr r10,SPRG1
+ ld r11,PACA_EXSLB+EX_R9(r13)
+ ld r12,PACA_EXSLB+EX_R3(r13)
+ std r10,PACA_EXGEN+EX_R13(r13)
+ std r11,PACA_EXGEN+EX_R9(r13)
+ std r12,PACA_EXGEN+EX_R3(r13)
+ clrrdi r12,r13,32
+ mfmsr r10
+ mfspr r11,SRR0 /* save SRR0 */
+ ori r12,r12,slb_miss_user_common@l /* virt addr of handler */
+ ori r10,r10,MSR_IR|MSR_DR|MSR_RI
+ mtspr SRR0,r12
+ mfspr r12,SRR1 /* and SRR1 */
+ mtspr SRR1,r10
+ rfid
+ b . /* prevent spec. execution */
+#endif /* __DISABLED__ */
+
/*
* Vectors for the FWNMI option. Share common code.
*/
.globl system_reset_fwnmi
+ .align 7
system_reset_fwnmi:
HMT_MEDIUM
mtspr SPRN_SPRG1,r13 /* save r13 */
EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common)
.globl machine_check_fwnmi
+ .align 7
machine_check_fwnmi:
HMT_MEDIUM
mtspr SPRN_SPRG1,r13 /* save r13 */
.globl data_access_slb_iSeries
data_access_slb_iSeries:
mtspr SPRN_SPRG1,r13 /* save r13 */
- EXCEPTION_PROLOG_ISERIES_1(PACA_EXSLB)
+ mfspr r13,SPRN_SPRG3 /* get paca address into r13 */
std r3,PACA_EXSLB+EX_R3(r13)
- ld r12,PACALPPACA+LPPACASRR1(r13)
mfspr r3,SPRN_DAR
- b .do_slb_miss
+ std r9,PACA_EXSLB+EX_R9(r13)
+ mfcr r9
+#ifdef __DISABLED__
+ cmpdi r3,0
+ bge slb_miss_user_iseries
+#endif
+ std r10,PACA_EXSLB+EX_R10(r13)
+ std r11,PACA_EXSLB+EX_R11(r13)
+ std r12,PACA_EXSLB+EX_R12(r13)
+ mfspr r10,SPRN_SPRG1
+ std r10,PACA_EXSLB+EX_R13(r13)
+ ld r12,PACALPPACA+LPPACASRR1(r13);
+ b .slb_miss_realmode
STD_EXCEPTION_ISERIES(0x400, instruction_access, PACA_EXGEN)
.globl instruction_access_slb_iSeries
instruction_access_slb_iSeries:
mtspr SPRN_SPRG1,r13 /* save r13 */
- EXCEPTION_PROLOG_ISERIES_1(PACA_EXSLB)
+ mfspr r13,SPRN_SPRG3 /* get paca address into r13 */
std r3,PACA_EXSLB+EX_R3(r13)
- ld r12,PACALPPACA+LPPACASRR1(r13)
- ld r3,PACALPPACA+LPPACASRR0(r13)
- b .do_slb_miss
+ ld r3,PACALPPACA+LPPACASRR0(r13) /* get SRR0 value */
+ std r9,PACA_EXSLB+EX_R9(r13)
+ mfcr r9
+#ifdef __DISABLED__
+ cmpdi r3,0
+ bge .slb_miss_user_iseries
+#endif
+ std r10,PACA_EXSLB+EX_R10(r13)
+ std r11,PACA_EXSLB+EX_R11(r13)
+ std r12,PACA_EXSLB+EX_R12(r13)
+ mfspr r10,SPRN_SPRG1
+ std r10,PACA_EXSLB+EX_R13(r13)
+ ld r12,PACALPPACA+LPPACASRR1(r13);
+ b .slb_miss_realmode
+
+#ifdef __DISABLED__
+slb_miss_user_iseries:
+ std r10,PACA_EXGEN+EX_R10(r13)
+ std r11,PACA_EXGEN+EX_R11(r13)
+ std r12,PACA_EXGEN+EX_R12(r13)
+ mfspr r10,SPRG1
+ ld r11,PACA_EXSLB+EX_R9(r13)
+ ld r12,PACA_EXSLB+EX_R3(r13)
+ std r10,PACA_EXGEN+EX_R13(r13)
+ std r11,PACA_EXGEN+EX_R9(r13)
+ std r12,PACA_EXGEN+EX_R3(r13)
+ EXCEPTION_PROLOG_ISERIES_2
+ b slb_miss_user_common
+#endif
MASKABLE_EXCEPTION_ISERIES(0x500, hardware_interrupt)
STD_EXCEPTION_ISERIES(0x600, alignment, PACA_EXGEN)
decrementer_iSeries_masked:
li r11,1
stb r11,PACALPPACA+LPPACADECRINT(r13)
- lwz r12,PACADEFAULTDECR(r13)
+ LOADBASE(r12,tb_ticks_per_jiffy)
+ lwz r12,OFF(tb_ticks_per_jiffy)(r12)
mtspr SPRN_DEC,r12
/* fall through */
li r5,0x400
b .do_hash_page /* Try to handle as hpte fault */
+/*
+ * Here is the common SLB miss user that is used when going to virtual
+ * mode for SLB misses, that is currently not used
+ */
+#ifdef __DISABLED__
+ .align 7
+ .globl slb_miss_user_common
+slb_miss_user_common:
+ mflr r10
+ std r3,PACA_EXGEN+EX_DAR(r13)
+ stw r9,PACA_EXGEN+EX_CCR(r13)
+ std r10,PACA_EXGEN+EX_LR(r13)
+ std r11,PACA_EXGEN+EX_SRR0(r13)
+ bl .slb_allocate_user
+
+ ld r10,PACA_EXGEN+EX_LR(r13)
+ ld r3,PACA_EXGEN+EX_R3(r13)
+ lwz r9,PACA_EXGEN+EX_CCR(r13)
+ ld r11,PACA_EXGEN+EX_SRR0(r13)
+ mtlr r10
+ beq- slb_miss_fault
+
+ andi. r10,r12,MSR_RI /* check for unrecoverable exception */
+ beq- unrecov_user_slb
+ mfmsr r10
+
+.machine push
+.machine "power4"
+ mtcrf 0x80,r9
+.machine pop
+
+ clrrdi r10,r10,2 /* clear RI before setting SRR0/1 */
+ mtmsrd r10,1
+
+ mtspr SRR0,r11
+ mtspr SRR1,r12
+
+ ld r9,PACA_EXGEN+EX_R9(r13)
+ ld r10,PACA_EXGEN+EX_R10(r13)
+ ld r11,PACA_EXGEN+EX_R11(r13)
+ ld r12,PACA_EXGEN+EX_R12(r13)
+ ld r13,PACA_EXGEN+EX_R13(r13)
+ rfid
+ b .
+
+slb_miss_fault:
+ EXCEPTION_PROLOG_COMMON(0x380, PACA_EXGEN)
+ ld r4,PACA_EXGEN+EX_DAR(r13)
+ li r5,0
+ std r4,_DAR(r1)
+ std r5,_DSISR(r1)
+ b .handle_page_fault
+
+unrecov_user_slb:
+ EXCEPTION_PROLOG_COMMON(0x4200, PACA_EXGEN)
+ DISABLE_INTS
+ bl .save_nvgprs
+1: addi r3,r1,STACK_FRAME_OVERHEAD
+ bl .unrecoverable_exception
+ b 1b
+
+#endif /* __DISABLED__ */
+
+
+/*
+ * r13 points to the PACA, r9 contains the saved CR,
+ * r12 contain the saved SRR1, SRR0 is still ready for return
+ * r3 has the faulting address
+ * r9 - r13 are saved in paca->exslb.
+ * r3 is saved in paca->slb_r3
+ * We assume we aren't going to take any exceptions during this procedure.
+ */
+_GLOBAL(slb_miss_realmode)
+ mflr r10
+
+ stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */
+ std r10,PACA_EXSLB+EX_LR(r13) /* save LR */
+
+ bl .slb_allocate_realmode
+
+ /* All done -- return from exception. */
+
+ ld r10,PACA_EXSLB+EX_LR(r13)
+ ld r3,PACA_EXSLB+EX_R3(r13)
+ lwz r9,PACA_EXSLB+EX_CCR(r13) /* get saved CR */
+#ifdef CONFIG_PPC_ISERIES
+ ld r11,PACALPPACA+LPPACASRR0(r13) /* get SRR0 value */
+#endif /* CONFIG_PPC_ISERIES */
+
+ mtlr r10
+
+ andi. r10,r12,MSR_RI /* check for unrecoverable exception */
+ beq- unrecov_slb
+
+.machine push
+.machine "power4"
+ mtcrf 0x80,r9
+ mtcrf 0x01,r9 /* slb_allocate uses cr0 and cr7 */
+.machine pop
+
+#ifdef CONFIG_PPC_ISERIES
+ mtspr SPRN_SRR0,r11
+ mtspr SPRN_SRR1,r12
+#endif /* CONFIG_PPC_ISERIES */
+ ld r9,PACA_EXSLB+EX_R9(r13)
+ ld r10,PACA_EXSLB+EX_R10(r13)
+ ld r11,PACA_EXSLB+EX_R11(r13)
+ ld r12,PACA_EXSLB+EX_R12(r13)
+ ld r13,PACA_EXSLB+EX_R13(r13)
+ rfid
+ b . /* prevent speculative execution */
+
+unrecov_slb:
+ EXCEPTION_PROLOG_COMMON(0x4100, PACA_EXSLB)
+ DISABLE_INTS
+ bl .save_nvgprs
+1: addi r3,r1,STACK_FRAME_OVERHEAD
+ bl .unrecoverable_exception
+ b 1b
+
.align 7
.globl hardware_interrupt_common
.globl hardware_interrupt_entry
rfid
b . /* prevent speculative execution */
-/*
- * r13 points to the PACA, r9 contains the saved CR,
- * r11 and r12 contain the saved SRR0 and SRR1.
- * r3 has the faulting address
- * r9 - r13 are saved in paca->exslb.
- * r3 is saved in paca->slb_r3
- * We assume we aren't going to take any exceptions during this procedure.
- */
-_GLOBAL(do_slb_miss)
- mflr r10
-
- stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */
- std r10,PACA_EXSLB+EX_LR(r13) /* save LR */
-
- bl .slb_allocate /* handle it */
-
- /* All done -- return from exception. */
-
- ld r10,PACA_EXSLB+EX_LR(r13)
- ld r3,PACA_EXSLB+EX_R3(r13)
- lwz r9,PACA_EXSLB+EX_CCR(r13) /* get saved CR */
-#ifdef CONFIG_PPC_ISERIES
- ld r11,PACALPPACA+LPPACASRR0(r13) /* get SRR0 value */
-#endif /* CONFIG_PPC_ISERIES */
-
- mtlr r10
-
- andi. r10,r12,MSR_RI /* check for unrecoverable exception */
- beq- unrecov_slb
-
-.machine push
-.machine "power4"
- mtcrf 0x80,r9
- mtcrf 0x01,r9 /* slb_allocate uses cr0 and cr7 */
-.machine pop
-
-#ifdef CONFIG_PPC_ISERIES
- mtspr SPRN_SRR0,r11
- mtspr SPRN_SRR1,r12
-#endif /* CONFIG_PPC_ISERIES */
- ld r9,PACA_EXSLB+EX_R9(r13)
- ld r10,PACA_EXSLB+EX_R10(r13)
- ld r11,PACA_EXSLB+EX_R11(r13)
- ld r12,PACA_EXSLB+EX_R12(r13)
- ld r13,PACA_EXSLB+EX_R13(r13)
- rfid
- b . /* prevent speculative execution */
-
-unrecov_slb:
- EXCEPTION_PROLOG_COMMON(0x4100, PACA_EXSLB)
- DISABLE_INTS
- bl .save_nvgprs
-1: addi r3,r1,STACK_FRAME_OVERHEAD
- bl .unrecoverable_exception
- b 1b
-
/*
* Space for CPU0's segment table.
*
* fixed address (the linker can't compute (u64)&initial_stab >>
* PAGE_SHIFT).
*/
- . = STAB0_PHYS_ADDR /* 0x6000 */
+ . = STAB0_OFFSET /* 0x6000 */
.globl initial_stab
initial_stab:
.space 4096
*
*/
_GLOBAL(__start_initialization_multiplatform)
+#ifdef CONFIG_PPC_MULTIPLATFORM
/*
* Are we booted from a PROM Of-type client-interface ?
*/
cmpldi cr0,r5,0
bne .__boot_from_prom /* yes -> prom */
+#endif
/* Save parameters */
mr r31,r3
bl .__mmu_off
b .__after_prom_start
+#ifdef CONFIG_PPC_MULTIPLATFORM
_STATIC(__boot_from_prom)
/* Save parameters */
mr r31,r3
bl .prom_init
/* We never return */
trap
+#endif
/*
* At this point, r3 contains the physical address we are running at,
_STATIC(__after_prom_start)
/*
- * We need to run with __start at physical address 0.
+ * We need to run with __start at physical address PHYSICAL_START.
* This will leave some code in the first 256B of
* real memory, which are reserved for software use.
* The remainder of the first page is loaded with the fixed
mr r26,r3
SET_REG_TO_CONST(r27,KERNELBASE)
- li r3,0 /* target addr */
+ LOADADDR(r3, PHYSICAL_START) /* target addr */
// XXX FIXME: Use phys returned by OF (r30)
add r4,r27,r26 /* source addr */
* SPRG3 = paca virtual address
*/
_GLOBAL(__secondary_start)
+ /* Set thread priority to MEDIUM */
+ HMT_MEDIUM
- HMT_MEDIUM /* Set thread priority to MEDIUM */
-
+ /* Load TOC */
ld r2,PACATOC(r13)
- li r6,0
- stb r6,PACAPROCENABLED(r13)
-
-#ifndef CONFIG_PPC_ISERIES
- /* Initialize the page table pointer register. */
- LOADADDR(r6,_SDR1)
- ld r6,0(r6) /* get the value of _SDR1 */
- mtspr SPRN_SDR1,r6 /* set the htab location */
-#endif
- /* Initialize the first segment table (or SLB) entry */
- ld r3,PACASTABVIRT(r13) /* get addr of segment table */
- bl .stab_initialize
+
+ /* Do early setup for that CPU (stab, slb, hash table pointer) */
+ bl .early_setup_secondary
/* Initialize the kernel stack. Just a repeat for iSeries. */
LOADADDR(r3,current_set)
addi r1,r1,THREAD_SIZE-STACK_FRAME_OVERHEAD
std r1,PACAKSAVE(r13)
- ld r3,PACASTABREAL(r13) /* get raddr of segment table */
- ori r4,r3,1 /* turn on valid bit */
-
-#ifdef CONFIG_PPC_ISERIES
- li r0,-1 /* hypervisor call */
- li r3,1
- sldi r3,r3,63 /* 0x8000000000000000 */
- ori r3,r3,4 /* 0x8000000000000004 */
- sc /* HvCall_setASR */
-#else
- /* set the ASR */
- ld r3,systemcfg@got(r2) /* r3 = ptr to systemcfg */
- ld r3,0(r3)
- lwz r3,PLATFORM(r3) /* r3 = platform flags */
- andi. r3,r3,PLATFORM_LPAR /* Test if bit 0 is set (LPAR bit) */
- beq 98f /* branch if result is 0 */
- mfspr r3,SPRN_PVR
- srwi r3,r3,16
- cmpwi r3,0x37 /* SStar */
- beq 97f
- cmpwi r3,0x36 /* IStar */
- beq 97f
- cmpwi r3,0x34 /* Pulsar */
- bne 98f
-97: li r3,H_SET_ASR /* hcall = H_SET_ASR */
- HVSC /* Invoking hcall */
- b 99f
-98: /* !(rpa hypervisor) || !(star) */
- mtasr r4 /* set the stab location */
-99:
-#endif
+ /* Clear backchain so we get nice backtraces */
li r7,0
mtlr r7
li r3,0
std r3,0(r1) /* Zero the stack frame pointer */
bl .start_secondary
+ b .
#endif
/*
mulli r13,r27,PACA_SIZE /* Calculate vaddr of right paca */
add r13,r13,r24 /* for this processor. */
add r13,r13,r26 /* convert to physical addr */
- mtspr SPRN_SPRG3,r13 /* PPPBBB: Temp... -Peter */
+ mtspr SPRN_SPRG3,r13
/* Do very early kernel initializations, including initial hash table,
* stab and slb setup before we turn on relocation. */
mr r3,r31
bl .early_setup
- /* set the ASR */
- ld r3,PACASTABREAL(r13)
- ori r4,r3,1 /* turn on valid bit */
- ld r3,systemcfg@got(r2) /* r3 = ptr to systemcfg */
- ld r3,0(r3)
- lwz r3,PLATFORM(r3) /* r3 = platform flags */
- andi. r3,r3,PLATFORM_LPAR /* Test if bit 0 is set (LPAR bit) */
- beq 98f /* branch if result is 0 */
- mfspr r3,SPRN_PVR
- srwi r3,r3,16
- cmpwi r3,0x37 /* SStar */
- beq 97f
- cmpwi r3,0x36 /* IStar */
- beq 97f
- cmpwi r3,0x34 /* Pulsar */
- bne 98f
-97: li r3,H_SET_ASR /* hcall = H_SET_ASR */
- HVSC /* Invoking hcall */
- b 99f
-98: /* !(rpa hypervisor) || !(star) */
- mtasr r4 /* set the stab location */
-99:
- /* Set SDR1 (hash table pointer) */
- ld r3,systemcfg@got(r2) /* r3 = ptr to systemcfg */
- ld r3,0(r3)
- lwz r3,PLATFORM(r3) /* r3 = platform flags */
- /* Test if bit 0 is set (LPAR bit) */
- andi. r3,r3,PLATFORM_LPAR
- bne 98f /* branch if result is !0 */
- LOADADDR(r6,_SDR1) /* Only if NOT LPAR */
- add r6,r6,r26
- ld r6,0(r6) /* get the value of _SDR1 */
- mtspr SPRN_SDR1,r6 /* set the htab location */
-98:
LOADADDR(r3,.start_here_common)
SET_REG_TO_CONST(r4, MSR_KERNEL)
mtspr SPRN_SRR0,r3
projects / powerpc.git / blobdiff