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-rw-r--r--arch/powerpc/kernel/Makefile8
-rw-r--r--arch/powerpc/kernel/align.c2
-rw-r--r--arch/powerpc/kernel/asm-offsets.c2
-rw-r--r--arch/powerpc/kernel/cpu_setup_ppc970.S4
-rw-r--r--arch/powerpc/kernel/entry_64.S16
-rw-r--r--arch/powerpc/kernel/head_64.S473
-rw-r--r--arch/powerpc/kernel/idle_6xx.S2
-rw-r--r--arch/powerpc/kernel/idle_e500.S3
-rw-r--r--arch/powerpc/kernel/irq.c169
-rw-r--r--arch/powerpc/kernel/misc.S10
-rw-r--r--arch/powerpc/kernel/module_64.c13
-rw-r--r--arch/powerpc/kernel/paca.c3
-rw-r--r--arch/powerpc/kernel/prom.c43
-rw-r--r--arch/powerpc/kernel/prom_init.c19
-rw-r--r--arch/powerpc/kernel/reloc_64.S87
-rw-r--r--arch/powerpc/kernel/setup-common.c17
-rw-r--r--arch/powerpc/kernel/setup_64.c9
-rw-r--r--arch/powerpc/kernel/sys_ppc32.c8
-rw-r--r--arch/powerpc/kernel/vmlinux.lds.S22
19 files changed, 561 insertions, 349 deletions
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index f17b5792ebc..16326fd92f9 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -14,12 +14,13 @@ endif
ifdef CONFIG_FTRACE
# Do not trace early boot code
-CFLAGS_REMOVE_cputable.o = -pg
-CFLAGS_REMOVE_prom_init.o = -pg
+CFLAGS_REMOVE_cputable.o = -pg -mno-sched-epilog
+CFLAGS_REMOVE_prom_init.o = -pg -mno-sched-epilog
+CFLAGS_REMOVE_btext.o = -pg -mno-sched-epilog
ifdef CONFIG_DYNAMIC_FTRACE
# dynamic ftrace setup.
-CFLAGS_REMOVE_ftrace.o = -pg
+CFLAGS_REMOVE_ftrace.o = -pg -mno-sched-epilog
endif
endif
@@ -34,6 +35,7 @@ obj-$(CONFIG_PPC64) += setup_64.o sys_ppc32.o \
paca.o cpu_setup_ppc970.o \
cpu_setup_pa6t.o \
firmware.o nvram_64.o
+obj64-$(CONFIG_RELOCATABLE) += reloc_64.o
obj-$(CONFIG_PPC64) += vdso64/
obj-$(CONFIG_ALTIVEC) += vecemu.o vector.o
obj-$(CONFIG_PPC_970_NAP) += idle_power4.o
diff --git a/arch/powerpc/kernel/align.c b/arch/powerpc/kernel/align.c
index 367129789cc..5af4e9b2dbe 100644
--- a/arch/powerpc/kernel/align.c
+++ b/arch/powerpc/kernel/align.c
@@ -647,7 +647,7 @@ static int emulate_vsx(unsigned char __user *addr, unsigned int reg,
unsigned int flags, unsigned int length)
{
char *ptr = (char *) &current->thread.TS_FPR(reg);
- int ret;
+ int ret = 0;
flush_vsx_to_thread(current);
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 92768d3006f..e9c4044012b 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -122,6 +122,8 @@ int main(void)
DEFINE(PACASTABRR, offsetof(struct paca_struct, stab_rr));
DEFINE(PACAR1, offsetof(struct paca_struct, saved_r1));
DEFINE(PACATOC, offsetof(struct paca_struct, kernel_toc));
+ DEFINE(PACAKBASE, offsetof(struct paca_struct, kernelbase));
+ DEFINE(PACAKMSR, offsetof(struct paca_struct, kernel_msr));
DEFINE(PACASOFTIRQEN, offsetof(struct paca_struct, soft_enabled));
DEFINE(PACAHARDIRQEN, offsetof(struct paca_struct, hard_enabled));
DEFINE(PACASLBCACHE, offsetof(struct paca_struct, slb_cache));
diff --git a/arch/powerpc/kernel/cpu_setup_ppc970.S b/arch/powerpc/kernel/cpu_setup_ppc970.S
index bf118c38575..27f2507279d 100644
--- a/arch/powerpc/kernel/cpu_setup_ppc970.S
+++ b/arch/powerpc/kernel/cpu_setup_ppc970.S
@@ -110,7 +110,7 @@ load_hids:
isync
/* Save away cpu state */
- LOAD_REG_IMMEDIATE(r5,cpu_state_storage)
+ LOAD_REG_ADDR(r5,cpu_state_storage)
/* Save HID0,1,4 and 5 */
mfspr r3,SPRN_HID0
@@ -134,7 +134,7 @@ _GLOBAL(__restore_cpu_ppc970)
rldicl. r0,r0,4,63
beqlr
- LOAD_REG_IMMEDIATE(r5,cpu_state_storage)
+ LOAD_REG_ADDR(r5,cpu_state_storage)
/* Before accessing memory, we make sure rm_ci is clear */
li r0,0
mfspr r3,SPRN_HID4
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 55445f1dba8..fd8b4bae9b0 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -690,10 +690,6 @@ _GLOBAL(enter_rtas)
std r7,_DAR(r1)
mfdsisr r8
std r8,_DSISR(r1)
- mfsrr0 r9
- std r9,_SRR0(r1)
- mfsrr1 r10
- std r10,_SRR1(r1)
/* Temporary workaround to clear CR until RTAS can be modified to
* ignore all bits.
@@ -754,6 +750,10 @@ _STATIC(rtas_return_loc)
mfspr r4,SPRN_SPRG3 /* Get PACA */
clrldi r4,r4,2 /* convert to realmode address */
+ bcl 20,31,$+4
+0: mflr r3
+ ld r3,(1f-0b)(r3) /* get &.rtas_restore_regs */
+
mfmsr r6
li r0,MSR_RI
andc r6,r6,r0
@@ -761,7 +761,6 @@ _STATIC(rtas_return_loc)
mtmsrd r6
ld r1,PACAR1(r4) /* Restore our SP */
- LOAD_REG_IMMEDIATE(r3,.rtas_restore_regs)
ld r4,PACASAVEDMSR(r4) /* Restore our MSR */
mtspr SPRN_SRR0,r3
@@ -769,6 +768,9 @@ _STATIC(rtas_return_loc)
rfid
b . /* prevent speculative execution */
+ .align 3
+1: .llong .rtas_restore_regs
+
_STATIC(rtas_restore_regs)
/* relocation is on at this point */
REST_GPR(2, r1) /* Restore the TOC */
@@ -788,10 +790,6 @@ _STATIC(rtas_restore_regs)
mtdar r7
ld r8,_DSISR(r1)
mtdsisr r8
- ld r9,_SRR0(r1)
- mtsrr0 r9
- ld r10,_SRR1(r1)
- mtsrr1 r10
addi r1,r1,RTAS_FRAME_SIZE /* Unstack our frame */
ld r0,16(r1) /* get return address */
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index cc8fb474d52..84856bee33a 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -82,7 +82,11 @@ END_FTR_SECTION(0, 1)
/* Catch branch to 0 in real mode */
trap
- /* Secondary processors spin on this value until it goes to 1. */
+ /* Secondary processors spin on this value until it becomes nonzero.
+ * When it does it contains the real address of the descriptor
+ * of the function that the cpu should jump to to continue
+ * initialization.
+ */
.globl __secondary_hold_spinloop
__secondary_hold_spinloop:
.llong 0x0
@@ -109,8 +113,11 @@ __secondary_hold_acknowledge:
* before the bulk of the kernel has been relocated. This code
* is relocated to physical address 0x60 before prom_init is run.
* All of it must fit below the first exception vector at 0x100.
+ * Use .globl here not _GLOBAL because we want __secondary_hold
+ * to be the actual text address, not a descriptor.
*/
-_GLOBAL(__secondary_hold)
+ .globl __secondary_hold
+__secondary_hold:
mfmsr r24
ori r24,r24,MSR_RI
mtmsrd r24 /* RI on */
@@ -121,16 +128,16 @@ _GLOBAL(__secondary_hold)
/* Tell the master cpu we're here */
/* Relocation is off & we are located at an address less */
/* than 0x100, so only need to grab low order offset. */
- std r24,__secondary_hold_acknowledge@l(0)
+ std r24,__secondary_hold_acknowledge-_stext(0)
sync
/* All secondary cpus wait here until told to start. */
-100: ld r4,__secondary_hold_spinloop@l(0)
- cmpdi 0,r4,1
- bne 100b
+100: ld r4,__secondary_hold_spinloop-_stext(0)
+ cmpdi 0,r4,0
+ beq 100b
#if defined(CONFIG_SMP) || defined(CONFIG_KEXEC)
- LOAD_REG_IMMEDIATE(r4, .generic_secondary_smp_init)
+ ld r4,0(r4) /* deref function descriptor */
mtctr r4
mr r3,r24
bctr
@@ -147,6 +154,10 @@ exception_marker:
/*
* This is the start of the interrupt handlers for pSeries
* This code runs with relocation off.
+ * Code from here to __end_interrupts gets copied down to real
+ * address 0x100 when we are running a relocatable kernel.
+ * Therefore any relative branches in this section must only
+ * branch to labels in this section.
*/
. = 0x100
.globl __start_interrupts
@@ -200,7 +211,20 @@ data_access_slb_pSeries:
mfspr r10,SPRN_SPRG1
std r10,PACA_EXSLB+EX_R13(r13)
mfspr r12,SPRN_SRR1 /* and SRR1 */
- b .slb_miss_realmode /* Rel. branch works in real mode */
+#ifndef CONFIG_RELOCATABLE
+ b .slb_miss_realmode
+#else
+ /*
+ * We can't just use a direct branch to .slb_miss_realmode
+ * because the distance from here to there depends on where
+ * the kernel ends up being put.
+ */
+ mfctr r11
+ ld r10,PACAKBASE(r13)
+ LOAD_HANDLER(r10, .slb_miss_realmode)
+ mtctr r10
+ bctr
+#endif
STD_EXCEPTION_PSERIES(0x400, instruction_access)
@@ -225,7 +249,15 @@ instruction_access_slb_pSeries:
mfspr r10,SPRN_SPRG1
std r10,PACA_EXSLB+EX_R13(r13)
mfspr r12,SPRN_SRR1 /* and SRR1 */
- b .slb_miss_realmode /* Rel. branch works in real mode */
+#ifndef CONFIG_RELOCATABLE
+ b .slb_miss_realmode
+#else
+ mfctr r11
+ ld r10,PACAKBASE(r13)
+ LOAD_HANDLER(r10, .slb_miss_realmode)
+ mtctr r10
+ bctr
+#endif
MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt)
STD_EXCEPTION_PSERIES(0x600, alignment)
@@ -244,14 +276,12 @@ BEGIN_FTR_SECTION
beq- 1f
END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE)
mr r9,r13
- mfmsr r10
mfspr r13,SPRN_SPRG3
mfspr r11,SPRN_SRR0
- clrrdi r12,r13,32
- oris r12,r12,system_call_common@h
- ori r12,r12,system_call_common@l
+ ld r12,PACAKBASE(r13)
+ ld r10,PACAKMSR(r13)
+ LOAD_HANDLER(r12, system_call_entry)
mtspr SPRN_SRR0,r12
- ori r10,r10,MSR_IR|MSR_DR|MSR_RI
mfspr r12,SPRN_SRR1
mtspr SPRN_SRR1,r10
rfid
@@ -325,16 +355,32 @@ do_stab_bolted_pSeries:
mfspr r12,SPRN_SPRG2
EXCEPTION_PROLOG_PSERIES(PACA_EXSLB, .do_stab_bolted)
+#ifdef CONFIG_PPC_PSERIES
+/*
+ * 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 */
+ EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common)
+
+#endif /* CONFIG_PPC_PSERIES */
+
+#ifdef __DISABLED__
/*
- * 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)
@@ -357,25 +403,17 @@ slb_miss_user_pseries:
b . /* prevent spec. execution */
#endif /* __DISABLED__ */
-#ifdef CONFIG_PPC_PSERIES
+ .align 7
+ .globl __end_interrupts
+__end_interrupts:
+
/*
- * Vectors for the FWNMI option. Share common code.
+ * Code from here down to __end_handlers is invoked from the
+ * exception prologs above. Because the prologs assemble the
+ * addresses of these handlers using the LOAD_HANDLER macro,
+ * which uses an addi instruction, these handlers must be in
+ * the first 32k of the kernel image.
*/
- .globl system_reset_fwnmi
- .align 7
-system_reset_fwnmi:
- HMT_MEDIUM
- mtspr SPRN_SPRG1,r13 /* save r13 */
- EXCEPTION_PROLOG_PSERIES_FORCE_64BIT(PACA_EXGEN, system_reset_common)
-
- .globl machine_check_fwnmi
- .align 7
-machine_check_fwnmi:
- HMT_MEDIUM
- mtspr SPRN_SPRG1,r13 /* save r13 */
- EXCEPTION_PROLOG_PSERIES_FORCE_64BIT(PACA_EXMC, machine_check_common)
-
-#endif /* CONFIG_PPC_PSERIES */
/*** Common interrupt handlers ***/
@@ -414,6 +452,10 @@ machine_check_common:
STD_EXCEPTION_COMMON(0x1800, cbe_thermal, .cbe_thermal_exception)
#endif /* CONFIG_CBE_RAS */
+ .align 7
+system_call_entry:
+ b system_call_common
+
/*
* Here we have detected that the kernel stack pointer is bad.
* R9 contains the saved CR, r13 points to the paca,
@@ -457,65 +499,6 @@ bad_stack:
b 1b
/*
- * Return from an exception with minimal checks.
- * The caller is assumed to have done EXCEPTION_PROLOG_COMMON.
- * If interrupts have been enabled, or anything has been
- * done that might have changed the scheduling status of
- * any task or sent any task a signal, you should use
- * ret_from_except or ret_from_except_lite instead of this.
- */
-fast_exc_return_irq: /* restores irq state too */
- ld r3,SOFTE(r1)
- TRACE_AND_RESTORE_IRQ(r3);
- ld r12,_MSR(r1)
- rldicl r4,r12,49,63 /* get MSR_EE to LSB */
- stb r4,PACAHARDIRQEN(r13) /* restore paca->hard_enabled */
- b 1f
-
- .globl fast_exception_return
-fast_exception_return:
- ld r12,_MSR(r1)
-1: ld r11,_NIP(r1)
- andi. r3,r12,MSR_RI /* check if RI is set */
- beq- unrecov_fer
-
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
- andi. r3,r12,MSR_PR
- beq 2f
- ACCOUNT_CPU_USER_EXIT(r3, r4)
-2:
-#endif
-
- ld r3,_CCR(r1)
- ld r4,_LINK(r1)
- ld r5,_CTR(r1)
- ld r6,_XER(r1)
- mtcr r3
- mtlr r4
- mtctr r5
- mtxer r6
- REST_GPR(0, r1)
- REST_8GPRS(2, r1)
-
- mfmsr r10
- rldicl r10,r10,48,1 /* clear EE */
- rldicr r10,r10,16,61 /* clear RI (LE is 0 already) */
- mtmsrd r10,1
-
- mtspr SPRN_SRR1,r12
- mtspr SPRN_SRR0,r11
- REST_4GPRS(10, r1)
- ld r1,GPR1(r1)
- rfid
- b . /* prevent speculative execution */
-
-unrecov_fer:
- bl .save_nvgprs
-1: addi r3,r1,STACK_FRAME_OVERHEAD
- bl .unrecoverable_exception
- b 1b
-
-/*
* Here r13 points to the paca, r9 contains the saved CR,
* SRR0 and SRR1 are saved in r11 and r12,
* r9 - r13 are saved in paca->exgen.
@@ -616,6 +599,9 @@ unrecov_user_slb:
*/
_GLOBAL(slb_miss_realmode)
mflr r10
+#ifdef CONFIG_RELOCATABLE
+ mtctr r11
+#endif
stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */
std r10,PACA_EXSLB+EX_LR(r13) /* save LR */
@@ -666,11 +652,10 @@ BEGIN_FW_FTR_SECTION
END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
#endif /* CONFIG_PPC_ISERIES */
mfspr r11,SPRN_SRR0
- clrrdi r10,r13,32
+ ld r10,PACAKBASE(r13)
LOAD_HANDLER(r10,unrecov_slb)
mtspr SPRN_SRR0,r10
- mfmsr r10
- ori r10,r10,MSR_IR|MSR_DR|MSR_RI
+ ld r10,PACAKMSR(r13)
mtspr SPRN_SRR1,r10
rfid
b .
@@ -766,6 +751,85 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
bl .altivec_unavailable_exception
b .ret_from_except
+ .align 7
+ .globl vsx_unavailable_common
+vsx_unavailable_common:
+ EXCEPTION_PROLOG_COMMON(0xf40, PACA_EXGEN)
+#ifdef CONFIG_VSX
+BEGIN_FTR_SECTION
+ bne .load_up_vsx
+1:
+END_FTR_SECTION_IFSET(CPU_FTR_VSX)
+#endif
+ bl .save_nvgprs
+ addi r3,r1,STACK_FRAME_OVERHEAD
+ ENABLE_INTS
+ bl .vsx_unavailable_exception
+ b .ret_from_except
+
+ .align 7
+ .globl __end_handlers
+__end_handlers:
+
+/*
+ * Return from an exception with minimal checks.
+ * The caller is assumed to have done EXCEPTION_PROLOG_COMMON.
+ * If interrupts have been enabled, or anything has been
+ * done that might have changed the scheduling status of
+ * any task or sent any task a signal, you should use
+ * ret_from_except or ret_from_except_lite instead of this.
+ */
+fast_exc_return_irq: /* restores irq state too */
+ ld r3,SOFTE(r1)
+ TRACE_AND_RESTORE_IRQ(r3);
+ ld r12,_MSR(r1)
+ rldicl r4,r12,49,63 /* get MSR_EE to LSB */
+ stb r4,PACAHARDIRQEN(r13) /* restore paca->hard_enabled */
+ b 1f
+
+ .globl fast_exception_return
+fast_exception_return:
+ ld r12,_MSR(r1)
+1: ld r11,_NIP(r1)
+ andi. r3,r12,MSR_RI /* check if RI is set */
+ beq- unrecov_fer
+
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+ andi. r3,r12,MSR_PR
+ beq 2f
+ ACCOUNT_CPU_USER_EXIT(r3, r4)
+2:
+#endif
+
+ ld r3,_CCR(r1)
+ ld r4,_LINK(r1)
+ ld r5,_CTR(r1)
+ ld r6,_XER(r1)
+ mtcr r3
+ mtlr r4
+ mtctr r5
+ mtxer r6
+ REST_GPR(0, r1)
+ REST_8GPRS(2, r1)
+
+ mfmsr r10
+ rldicl r10,r10,48,1 /* clear EE */
+ rldicr r10,r10,16,61 /* clear RI (LE is 0 already) */
+ mtmsrd r10,1
+
+ mtspr SPRN_SRR1,r12
+ mtspr SPRN_SRR0,r11
+ REST_4GPRS(10, r1)
+ ld r1,GPR1(r1)
+ rfid
+ b . /* prevent speculative execution */
+
+unrecov_fer:
+ bl .save_nvgprs
+1: addi r3,r1,STACK_FRAME_OVERHEAD
+ bl .unrecoverable_exception
+ b 1b
+
#ifdef CONFIG_ALTIVEC
/*
* load_up_altivec(unused, unused, tsk)
@@ -840,22 +904,6 @@ _STATIC(load_up_altivec)
blr
#endif /* CONFIG_ALTIVEC */
- .align 7
- .globl vsx_unavailable_common
-vsx_unavailable_common:
- EXCEPTION_PROLOG_COMMON(0xf40, PACA_EXGEN)
-#ifdef CONFIG_VSX
-BEGIN_FTR_SECTION
- bne .load_up_vsx
-1:
-END_FTR_SECTION_IFSET(CPU_FTR_VSX)
-#endif
- bl .save_nvgprs
- addi r3,r1,STACK_FRAME_OVERHEAD
- ENABLE_INTS
- bl .vsx_unavailable_exception
- b .ret_from_except
-
#ifdef CONFIG_VSX
/*
* load_up_vsx(unused, unused, tsk)
@@ -1175,11 +1223,14 @@ _GLOBAL(generic_secondary_smp_init)
/* turn on 64-bit mode */
bl .enable_64b_mode
+ /* get the TOC pointer (real address) */
+ bl .relative_toc
+
/* Set up a paca value for this processor. Since we have the
* physical cpu id in r24, we need to search the pacas to find
* which logical id maps to our physical one.
*/
- LOAD_REG_IMMEDIATE(r13, paca) /* Get base vaddr of paca array */
+ LOAD_REG_ADDR(r13, paca) /* Get base vaddr of paca array */
li r5,0 /* logical cpu id */
1: lhz r6,PACAHWCPUID(r13) /* Load HW procid from paca */
cmpw r6,r24 /* Compare to our id */
@@ -1208,7 +1259,7 @@ _GLOBAL(generic_secondary_smp_init)
sync /* order paca.run and cur_cpu_spec */
/* See if we need to call a cpu state restore handler */
- LOAD_REG_IMMEDIATE(r23, cur_cpu_spec)
+ LOAD_REG_ADDR(r23, cur_cpu_spec)
ld r23,0(r23)
ld r23,CPU_SPEC_RESTORE(r23)
cmpdi 0,r23,0
@@ -1224,10 +1275,15 @@ _GLOBAL(generic_secondary_smp_init)
b __secondary_start
#endif
+/*
+ * Turn the MMU off.
+ * Assumes we're mapped EA == RA if the MMU is on.
+ */
_STATIC(__mmu_off)
mfmsr r3
andi. r0,r3,MSR_IR|MSR_DR
beqlr
+ mflr r4
andc r3,r3,r0
mtspr SPRN_SRR0,r4
mtspr SPRN_SRR1,r3
@@ -1248,6 +1304,18 @@ _STATIC(__mmu_off)
*
*/
_GLOBAL(__start_initialization_multiplatform)
+ /* Make sure we are running in 64 bits mode */
+ bl .enable_64b_mode
+
+ /* Get TOC pointer (current runtime address) */
+ bl .relative_toc
+
+ /* find out where we are now */
+ bcl 20,31,$+4
+0: mflr r26 /* r26 = runtime addr here */
+ addis r26,r26,(_stext - 0b)@ha
+ addi r26,r26,(_stext - 0b)@l /* current runtime base addr */
+
/*
* Are we booted from a PROM Of-type client-interface ?
*/
@@ -1259,9 +1327,6 @@ _GLOBAL(__start_initialization_multiplatform)
mr r31,r3
mr r30,r4
- /* Make sure we are running in 64 bits mode */
- bl .enable_64b_mode
-
/* Setup some critical 970 SPRs before switching MMU off */
mfspr r0,SPRN_PVR
srwi r0,r0,16
@@ -1276,9 +1341,7 @@ _GLOBAL(__start_initialization_multiplatform)
1: bl .__cpu_preinit_ppc970
2:
- /* Switch off MMU if not already */
- LOAD_REG_IMMEDIATE(r4, .__after_prom_start - KERNELBASE)
- add r4,r4,r30
+ /* Switch off MMU if not already off */
bl .__mmu_off
b .__after_prom_start
@@ -1293,22 +1356,15 @@ _INIT_STATIC(__boot_from_prom)
/*
* Align the stack to 16-byte boundary
* Depending on the size and layout of the ELF sections in the initial
- * boot binary, the stack pointer will be unalignet on PowerMac
+ * boot binary, the stack pointer may be unaligned on PowerMac
*/
rldicr r1,r1,0,59
- /* Make sure we are running in 64 bits mode */
- bl .enable_64b_mode
-
- /* put a relocation offset into r3 */
- bl .reloc_offset
-
- LOAD_REG_IMMEDIATE(r2,__toc_start)
- addi r2,r2,0x4000
- addi r2,r2,0x4000
-
- /* Relocate the TOC from a virt addr to a real addr */
- add r2,r2,r3
+#ifdef CONFIG_RELOCATABLE
+ /* Relocate code for where we are now */
+ mr r3,r26
+ bl .relocate
+#endif
/* Restore parameters */
mr r3,r31
@@ -1318,60 +1374,51 @@ _INIT_STATIC(__boot_from_prom)
mr r7,r27
/* Do all of the interaction with OF client interface */
+ mr r8,r26
bl .prom_init
/* We never return */
trap
_STATIC(__after_prom_start)
+#ifdef CONFIG_RELOCATABLE
+ /* process relocations for the final address of the kernel */
+ lis r25,PAGE_OFFSET@highest /* compute virtual base of kernel */
+ sldi r25,r25,32
+ mr r3,r25
+ bl .relocate
+#endif
/*
- * We need to run with __start at physical address PHYSICAL_START.
+ * We need to run with _stext 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
- * interrupt vectors. The next two pages are filled with
- * unknown exception placeholders.
*
* Note: This process overwrites the OF exception vectors.
- * r26 == relocation offset
- * r27 == KERNELBASE
*/
- bl .reloc_offset
- mr r26,r3
- LOAD_REG_IMMEDIATE(r27, KERNELBASE)
-
- LOAD_REG_IMMEDIATE(r3, PHYSICAL_START) /* target addr */
-
- // XXX FIXME: Use phys returned by OF (r30)
- add r4,r27,r26 /* source addr */
- /* current address of _start */
- /* i.e. where we are running */
- /* the source addr */
-
- cmpdi r4,0 /* In some cases the loader may */
- bne 1f
- b .start_here_multiplatform /* have already put us at zero */
- /* so we can skip the copy. */
-1: LOAD_REG_IMMEDIATE(r5,copy_to_here) /* # bytes of memory to copy */
- sub r5,r5,r27
-
+ li r3,0 /* target addr */
+ mr. r4,r26 /* In some cases the loader may */
+ beq 9f /* have already put us at zero */
+ lis r5,(copy_to_here - _stext)@ha
+ addi r5,r5,(copy_to_here - _stext)@l /* # bytes of memory to copy */
li r6,0x100 /* Start offset, the first 0x100 */
/* bytes were copied earlier. */
bl .copy_and_flush /* copy the first n bytes */
/* this includes the code being */
/* executed here. */
-
- LOAD_REG_IMMEDIATE(r0, 4f) /* Jump to the copy of this code */
- mtctr r0 /* that we just made/relocated */
+ addis r8,r3,(4f - _stext)@ha /* Jump to the copy of this code */
+ addi r8,r8,(4f - _stext)@l /* that we just made */
+ mtctr r8
bctr
-4: LOAD_REG_IMMEDIATE(r5,klimit)
- add r5,r5,r26
- ld r5,0(r5) /* get the value of klimit */
- sub r5,r5,r27
+4: /* Now copy the rest of the kernel up to _end */
+ addis r5,r26,(p_end - _stext)@ha
+ ld r5,(p_end - _stext)@l(r5) /* get _end */
bl .copy_and_flush /* copy the rest */
- b .start_here_multiplatform
+
+9: b .start_here_multiplatform
+
+p_end: .llong _end - _stext
/*
* Copy routine used to copy the kernel to start at physical address 0
@@ -1436,6 +1483,9 @@ _GLOBAL(pmac_secondary_start)
/* turn on 64-bit mode */
bl .enable_64b_mode
+ /* get TOC pointer (real address) */
+ bl .relative_toc
+
/* Copy some CPU settings from CPU 0 */
bl .__restore_cpu_ppc970
@@ -1445,10 +1495,10 @@ _GLOBAL(pmac_secondary_start)
mtmsrd r3 /* RI on */
/* Set up a paca value for this processor. */
- LOAD_REG_IMMEDIATE(r4, paca) /* Get base vaddr of paca array */
- mulli r13,r24,PACA_SIZE /* Calculate vaddr of right paca */
+ LOAD_REG_ADDR(r4,paca) /* Get base vaddr of paca array */
+ mulli r13,r24,PACA_SIZE /* Calculate vaddr of right paca */
add r13,r13,r4 /* for this processor. */
- mtspr SPRN_SPRG3,r13 /* Save vaddr of paca in SPRG3 */
+ mtspr SPRN_SPRG3,r13 /* Save vaddr of paca in SPRG3 */
/* Create a temp kernel stack for use before relocation is on. */
ld r1,PACAEMERGSP(r13)
@@ -1476,9 +1526,6 @@ __secondary_start:
/* Set thread priority to MEDIUM */
HMT_MEDIUM
- /* Load TOC */
- ld r2,PACATOC(r13)
-
/* Do early setup for that CPU (stab, slb, hash table pointer) */
bl .early_setup_secondary
@@ -1515,9 +1562,11 @@ END_FW_FTR_SECTION_IFCLR(FW_FEATURE_ISERIES)
/*
* Running with relocation on at this point. All we want to do is
- * zero the stack back-chain pointer before going into C code.
+ * zero the stack back-chain pointer and get the TOC virtual address
+ * before going into C code.
*/
_GLOBAL(start_secondary_prolog)
+ ld r2,PACATOC(r13)
li r3,0
std r3,0(r1) /* Zero the stack frame pointer */
bl .start_secondary
@@ -1529,34 +1578,46 @@ _GLOBAL(start_secondary_prolog)
*/
_GLOBAL(enable_64b_mode)
mfmsr r11 /* grab the current MSR */
- li r12,1
- rldicr r12,r12,MSR_SF_LG,(63-MSR_SF_LG)
- or r11,r11,r12
- li r12,1
- rldicr r12,r12,MSR_ISF_LG,(63-MSR_ISF_LG)
+ li r12,(MSR_SF | MSR_ISF)@highest
+ sldi r12,r12,48
or r11,r11,r12
mtmsrd r11
isync
blr
/*
+ * This puts the TOC pointer into r2, offset by 0x8000 (as expected
+ * by the toolchain). It computes the correct value for wherever we
+ * are running at the moment, using position-independent code.
+ */
+_GLOBAL(relative_toc)
+ mflr r0
+ bcl 20,31,$+4
+0: mflr r9
+ ld r2,(p_toc - 0b)(r9)
+ add r2,r2,r9
+ mtlr r0
+ blr
+
+p_toc: .llong __toc_start + 0x8000 - 0b
+
+/*
* This is where the main kernel code starts.
*/
_INIT_STATIC(start_here_multiplatform)
- /* get a new offset, now that the kernel has moved. */
- bl .reloc_offset
- mr r26,r3
+ /* set up the TOC (real address) */
+ bl .relative_toc
/* Clear out the BSS. It may have been done in prom_init,
* already but that's irrelevant since prom_init will soon
* be detached from the kernel completely. Besides, we need
* to clear it now for kexec-style entry.
*/
- LOAD_REG_IMMEDIATE(r11,__bss_stop)
- LOAD_REG_IMMEDIATE(r8,__bss_start)
+ LOAD_REG_ADDR(r11,__bss_stop)
+ LOAD_REG_ADDR(r8,__bss_start)
sub r11,r11,r8 /* bss size */
addi r11,r11,7 /* round up to an even double word */
- rldicl. r11,r11,61,3 /* shift right by 3 */
+ srdi. r11,r11,3 /* shift right by 3 */
beq 4f
addi r8,r8,-8
li r0,0
@@ -1569,35 +1630,35 @@ _INIT_STATIC(start_here_multiplatform)
ori r6,r6,MSR_RI
mtmsrd r6 /* RI on */
- /* The following gets the stack and TOC set up with the regs */
+#ifdef CONFIG_RELOCATABLE
+ /* Save the physical address we're running at in kernstart_addr */
+ LOAD_REG_ADDR(r4, kernstart_addr)
+ clrldi r0,r25,2
+ std r0,0(r4)
+#endif
+
+ /* The following gets the stack set up with the regs */
/* pointing to the real addr of the kernel stack. This is */
/* all done to support the C function call below which sets */
/* up the htab. This is done because we have relocated the */
/* kernel but are still running in real mode. */
- LOAD_REG_IMMEDIATE(r3,init_thread_union)
- add r3,r3,r26
+ LOAD_REG_ADDR(r3,init_thread_union)
- /* set up a stack pointer (physical address) */
+ /* set up a stack pointer */
addi r1,r3,THREAD_SIZE
li r0,0
stdu r0,-STACK_FRAME_OVERHEAD(r1)
- /* set up the TOC (physical address) */
- LOAD_REG_IMMEDIATE(r2,__toc_start)
- addi r2,r2,0x4000
- addi r2,r2,0x4000
- add r2,r2,r26
-
/* Do very early kernel initializations, including initial hash table,
* stab and slb setup before we turn on relocation. */
/* Restore parameters passed from prom_init/kexec */
mr r3,r31
- bl .early_setup
+ bl .early_setup /* also sets r13 and SPRG3 */
- LOAD_REG_IMMEDIATE(r3, .start_here_common)
- LOAD_REG_IMMEDIATE(r4, MSR_KERNEL)
+ LOAD_REG_ADDR(r3, .start_here_common)
+ ld r4,PACAKMSR(r13)
mtspr SPRN_SRR0,r3
mtspr SPRN_SRR1,r4
rfid
@@ -1606,20 +1667,10 @@ _INIT_STATIC(start_here_multiplatform)
/* This is where all platforms converge execution */
_INIT_GLOBAL(start_here_common)
/* relocation is on at this point */
+ std r1,PACAKSAVE(r13)
- /* The following code sets up the SP and TOC now that we are */
- /* running with translation enabled. */
-
- LOAD_REG_IMMEDIATE(r3,init_thread_union)
-
- /* set up the stack */
- addi r1,r3,THREAD_SIZE
- li r0,0
- stdu r0,-STACK_FRAME_OVERHEAD(r1)
-
- /* Load the TOC */
+ /* Load the TOC (virtual address) */
ld r2,PACATOC(r13)
- std r1,PACAKSAVE(r13)
bl .setup_system
diff --git a/arch/powerpc/kernel/idle_6xx.S b/arch/powerpc/kernel/idle_6xx.S
index 019b02d8844..15c611de1ee 100644
--- a/arch/powerpc/kernel/idle_6xx.S
+++ b/arch/powerpc/kernel/idle_6xx.S
@@ -158,7 +158,7 @@ _GLOBAL(power_save_ppc32_restore)
stw r9,_NIP(r11) /* make it do a blr */
#ifdef CONFIG_SMP
- mfspr r12,SPRN_SPRG3
+ rlwinm r12,r11,0,0,31-THREAD_SHIFT
lwz r11,TI_CPU(r12) /* get cpu number * 4 */
slwi r11,r11,2
#else
diff --git a/arch/powerpc/kernel/idle_e500.S b/arch/powerpc/kernel/idle_e500.S
index 06304034b39..47a1a983ff8 100644
--- a/arch/powerpc/kernel/idle_e500.S
+++ b/arch/powerpc/kernel/idle_e500.S
@@ -84,10 +84,11 @@ _GLOBAL(power_save_ppc32_restore)
stw r9,_NIP(r11) /* make it do a blr */
#ifdef CONFIG_SMP
- mfspr r12,SPRN_SPRG3
+ rlwinm r12,r1,0,0,31-THREAD_SHIFT
lwz r11,TI_CPU(r12) /* get cpu number * 4 */
slwi r11,r11,2
#else
li r11,0
#endif
+
b transfer_to_handler_cont
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index d972decf032..ac222d0ab12 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -439,8 +439,8 @@ void do_softirq(void)
static LIST_HEAD(irq_hosts);
static DEFINE_SPINLOCK(irq_big_lock);
-static DEFINE_PER_CPU(unsigned int, irq_radix_reader);
-static unsigned int irq_radix_writer;
+static unsigned int revmap_trees_allocated;
+static DEFINE_MUTEX(revmap_trees_mutex);
struct irq_map_entry irq_map[NR_IRQS];
static unsigned int irq_virq_count = NR_IRQS;
static struct irq_host *irq_default_host;
@@ -583,57 +583,6 @@ void irq_set_virq_count(unsigned int count)
irq_virq_count = count;
}
-/* radix tree not lockless safe ! we use a brlock-type mecanism
- * for now, until we can use a lockless radix tree
- */
-static void irq_radix_wrlock(unsigned long *flags)
-{
- unsigned int cpu, ok;
-
- spin_lock_irqsave(&irq_big_lock, *flags);
- irq_radix_writer = 1;
- smp_mb();
- do {
- barrier();
- ok = 1;
- for_each_possible_cpu(cpu) {
- if (per_cpu(irq_radix_reader, cpu)) {
- ok = 0;
- break;
- }
- }
- if (!ok)
- cpu_relax();
- } while(!ok);
-}
-
-static void irq_radix_wrunlock(unsigned long flags)
-{
- smp_wmb();
- irq_radix_writer = 0;
- spin_unlock_irqrestore(&irq_big_lock, flags);
-}
-
-static void irq_radix_rdlock(unsigned long *flags)
-{
- local_irq_save(*flags);
- __get_cpu_var(irq_radix_reader) = 1;
- smp_mb();
- if (likely(irq_radix_writer == 0))
- return;
- __get_cpu_var(irq_radix_reader) = 0;
- smp_wmb();
- spin_lock(&irq_big_lock);
- __get_cpu_var(irq_radix_reader) = 1;
- spin_unlock(&irq_big_lock);
-}
-
-static void irq_radix_rdunlock(unsigned long flags)
-{
- __get_cpu_var(irq_radix_reader) = 0;
- local_irq_restore(flags);
-}
-
static int irq_setup_virq(struct irq_host *host, unsigned int virq,
irq_hw_number_t hwirq)
{
@@ -788,7 +737,6 @@ void irq_dispose_mapping(unsigned int virq)
{
struct irq_host *host;
irq_hw_number_t hwirq;
- unsigned long flags;
if (virq == NO_IRQ)
return;
@@ -821,12 +769,16 @@ void irq_dispose_mapping(unsigned int virq)
host->revmap_data.linear.revmap[hwirq] = NO_IRQ;
break;
case IRQ_HOST_MAP_TREE:
- /* Check if radix tree allocated yet */
- if (host->revmap_data.tree.gfp_mask == 0)
+ /*
+ * Check if radix tree allocated yet, if not then nothing to
+ * remove.
+ */
+ smp_rmb();
+ if (revmap_trees_allocated < 1)
break;
- irq_radix_wrlock(&flags);
+ mutex_lock(&revmap_trees_mutex);
radix_tree_delete(&host->revmap_data.tree, hwirq);
- irq_radix_wrunlock(flags);
+ mutex_unlock(&revmap_trees_mutex);
break;
}
@@ -875,43 +827,62 @@ unsigned int irq_find_mapping(struct irq_host *host,
EXPORT_SYMBOL_GPL(irq_find_mapping);
-unsigned int irq_radix_revmap(struct irq_host *host,
- irq_hw_number_t hwirq)
+unsigned int irq_radix_revmap_lookup(struct irq_host *host,
+ irq_hw_number_t hwirq)
{
- struct radix_tree_root *tree;
struct irq_map_entry *ptr;
unsigned int virq;
- unsigned long flags;
WARN_ON(host->revmap_type != IRQ_HOST_MAP_TREE);
- /* Check if the radix tree exist yet. We test the value of
- * the gfp_mask for that. Sneaky but saves another int in the
- * structure. If not, we fallback to slow mode
+ /*
+ * Check if the radix tree exists and has bee initialized.
+ * If not, we fallback to slow mode
*/
- tree = &host->revmap_data.tree;
- if (tree->gfp_mask == 0)
+ if (revmap_trees_allocated < 2)
return irq_find_mapping(host, hwirq);
/* Now try to resolve */
- irq_radix_rdlock(&flags);
- ptr = radix_tree_lookup(tree, hwirq);
- irq_radix_rdunlock(flags);
+ /*
+ * No rcu_read_lock(ing) needed, the ptr returned can't go under us
+ * as it's referencing an entry in the static irq_map table.
+ */
+ ptr = radix_tree_lookup(&host->revmap_data.tree, hwirq);
- /* Found it, return */
- if (ptr) {
+ /*
+ * If found in radix tree, then fine.
+ * Else fallback to linear lookup - this should not happen in practice
+ * as it means that we failed to insert the node in the radix tree.
+ */
+ if (ptr)
virq = ptr - irq_map;
- return virq;
- }
+ else
+ virq = irq_find_mapping(host, hwirq);
+
+ return virq;
+}
+
+void irq_radix_revmap_insert(struct irq_host *host, unsigned int virq,
+ irq_hw_number_t hwirq)
+{
+
+ WARN_ON(host->revmap_type != IRQ_HOST_MAP_TREE);
+
+ /*
+ * Check if the radix tree exists yet.
+ * If not, then the irq will be inserted into the tree when it gets
+ * initialized.
+ */
+ smp_rmb();
+ if (revmap_trees_allocated < 1)
+ return;
- /* If not there, try to insert it */
- virq = irq_find_mapping(host, hwirq);
if (virq != NO_IRQ) {
- irq_radix_wrlock(&flags);
- radix_tree_insert(tree, hwirq, &irq_map[virq]);
- irq_radix_wrunlock(flags);
+ mutex_lock(&revmap_trees_mutex);
+ radix_tree_insert(&host->revmap_data.tree, hwirq,
+ &irq_map[virq]);
+ mutex_unlock(&revmap_trees_mutex);
}
- return virq;
}
unsigned int irq_linear_revmap(struct irq_host *host,
@@ -1020,14 +991,44 @@ void irq_early_init(void)
static int irq_late_init(void)
{
struct irq_host *h;
- unsigned long flags;
+ unsigned int i;
- irq_radix_wrlock(&flags);
+ /*
+ * No mutual exclusion with respect to accessors of the tree is needed
+ * here as the synchronization is done via the state variable
+ * revmap_trees_allocated.
+ */
list_for_each_entry(h, &irq_hosts, link) {
if (h->revmap_type == IRQ_HOST_MAP_TREE)
- INIT_RADIX_TREE(&h->revmap_data.tree, GFP_ATOMIC);
+ INIT_RADIX_TREE(&h->revmap_data.tree, GFP_KERNEL);
+ }
+
+ /*
+ * Make sure the radix trees inits are visible before setting
+ * the flag
+ */
+ smp_wmb();
+ revmap_trees_allocated = 1;
+
+ /*
+ * Insert the reverse mapping for those interrupts already present
+ * in irq_map[].
+ */
+ mutex_lock(&revmap_trees_mutex);
+ for (i = 0; i < irq_virq_count; i++) {
+ if (irq_map[i].host &&
+ (irq_map[i].host->revmap_type == IRQ_HOST_MAP_TREE))
+ radix_tree_insert(&irq_map[i].host->revmap_data.tree,
+ irq_map[i].hwirq, &irq_map[i]);
}
- irq_radix_wrunlock(flags);
+ mutex_unlock(&revmap_trees_mutex);
+
+ /*
+ * Make sure the radix trees insertions are visible before setting
+ * the flag
+ */
+ smp_wmb();
+ revmap_trees_allocated = 2;
return 0;
}
diff --git a/arch/powerpc/kernel/misc.S b/arch/powerpc/kernel/misc.S
index 85cb6f34084..2d29752cbe1 100644
--- a/arch/powerpc/kernel/misc.S
+++ b/arch/powerpc/kernel/misc.S
@@ -31,11 +31,14 @@ _GLOBAL(reloc_offset)
mflr r0
bl 1f
1: mflr r3
- LOAD_REG_IMMEDIATE(r4,1b)
+ PPC_LL r4,(2f-1b)(r3)
subf r3,r4,r3
mtlr r0
blr
+ .align 3
+2: PPC_LONG 1b
+
/*
* add_reloc_offset(x) returns x + reloc_offset().
*/
@@ -43,12 +46,15 @@ _GLOBAL(add_reloc_offset)
mflr r0
bl 1f
1: mflr r5
- LOAD_REG_IMMEDIATE(r4,1b)
+ PPC_LL r4,(2f-1b)(r5)
subf r5,r4,r5
add r3,r3,r5
mtlr r0
blr
+ .align 3
+2: PPC_LONG 1b
+
_GLOBAL(kernel_execve)
li r0,__NR_execve
sc
diff --git a/arch/powerpc/kernel/module_64.c b/arch/powerpc/kernel/module_64.c
index ee6a2982d56..ad79de272ff 100644
--- a/arch/powerpc/kernel/module_64.c
+++ b/arch/powerpc/kernel/module_64.c
@@ -21,8 +21,9 @@
#include <linux/err.h>
#include <linux/vmalloc.h>
#include <linux/bug.h>
+#include <linux/uaccess.h>
#include <asm/module.h>
-#include <asm/uaccess.h>
+#include <asm/sections.h>
#include <asm/firmware.h>
#include <asm/code-patching.h>
#include <linux/sort.h>
@@ -451,3 +452,13 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
return 0;
}
+
+void *dereference_function_descriptor(void *ptr)
+{
+ struct ppc64_opd_entry *desc = ptr;
+ void *p;
+
+ if (!probe_kernel_address(&desc->funcaddr, p))
+ ptr = p;
+ return ptr;
+}
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
index c9bf17eec31..48a347133f4 100644
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -12,6 +12,7 @@
#include <asm/lppaca.h>
#include <asm/paca.h>
+#include <asm/sections.h>
/* This symbol is provided by the linker - let it fill in the paca
* field correctly */
@@ -79,6 +80,8 @@ void __init initialise_pacas(void)
new_paca->lock_token = 0x8000;
new_paca->paca_index = cpu;
new_paca->kernel_toc = kernel_toc;
+ new_paca->kernelbase = (unsigned long) _stext;
+ new_paca->kernel_msr = MSR_KERNEL;
new_paca->hw_cpu_id = 0xffff;
new_paca->slb_shadow_ptr = &slb_shadow[cpu];
new_paca->__current = &init_task;
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 87d83c56b31..3a2dc7e6586 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -888,9 +888,10 @@ static u64 __init dt_mem_next_cell(int s, cell_t **cellp)
*/
static int __init early_init_dt_scan_drconf_memory(unsigned long node)
{
- cell_t *dm, *ls;
+ cell_t *dm, *ls, *usm;
unsigned long l, n, flags;
u64 base, size, lmb_size;
+ unsigned int is_kexec_kdump = 0, rngs;
ls = (cell_t *)of_get_flat_dt_prop(node, "ibm,lmb-size", &l);
if (ls == NULL || l < dt_root_size_cells * sizeof(cell_t))
@@ -905,6 +906,12 @@ static int __init early_init_dt_scan_drconf_memory(unsigned long node)
if (l < (n * (dt_root_addr_cells + 4) + 1) * sizeof(cell_t))
return 0;
+ /* check if this is a kexec/kdump kernel. */
+ usm = (cell_t *)of_get_flat_dt_prop(node, "linux,drconf-usable-memory",
+ &l);
+ if (usm != NULL)
+ is_kexec_kdump = 1;
+
for (; n != 0; --n) {
base = dt_mem_next_cell(dt_root_addr_cells, &dm);
flags = dm[3];
@@ -915,13 +922,34 @@ static int __init early_init_dt_scan_drconf_memory(unsigned long node)
if ((flags & 0x80) || !(flags & 0x8))
continue;
size = lmb_size;
- if (iommu_is_off) {
- if (base >= 0x80000000ul)
+ rngs = 1;
+ if (is_kexec_kdump) {
+ /*
+ * For each lmb in ibm,dynamic-memory, a corresponding
+ * entry in linux,drconf-usable-memory property contains
+ * a counter 'p' followed by 'p' (base, size) duple.
+ * Now read the counter from
+ * linux,drconf-usable-memory property
+ */
+ rngs = dt_mem_next_cell(dt_root_size_cells, &usm);
+ if (!rngs) /* there are no (base, size) duple */
continue;
- if ((base + size) > 0x80000000ul)
- size = 0x80000000ul - base;
}
- lmb_add(base, size);
+ do {
+ if (is_kexec_kdump) {
+ base = dt_mem_next_cell(dt_root_addr_cells,
+ &usm);
+ size = dt_mem_next_cell(dt_root_size_cells,
+ &usm);
+ }
+ if (iommu_is_off) {
+ if (base >= 0x80000000ul)
+ continue;
+ if ((base + size) > 0x80000000ul)
+ size = 0x80000000ul - base;
+ }
+ lmb_add(base, size);
+ } while (--rngs);
}
lmb_dump_all();
return 0;
@@ -1164,6 +1192,9 @@ void __init early_init_devtree(void *params)
/* Reserve LMB regions used by kernel, initrd, dt, etc... */
lmb_reserve(PHYSICAL_START, __pa(klimit) - PHYSICAL_START);
+ /* If relocatable, reserve first 32k for interrupt vectors etc. */
+ if (PHYSICAL_START > MEMORY_START)
+ lmb_reserve(MEMORY_START, 0x8000);
reserve_kdump_trampoline();
reserve_crashkernel();
early_reserve_mem();
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index b72849ac7db..7cf274a2b33 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -1321,7 +1321,7 @@ static void __init prom_initialize_tce_table(void)
*
* -- Cort
*/
-extern void __secondary_hold(void);
+extern char __secondary_hold;
extern unsigned long __secondary_hold_spinloop;
extern unsigned long __secondary_hold_acknowledge;
@@ -1342,13 +1342,7 @@ static void __init prom_hold_cpus(void)
= (void *) LOW_ADDR(__secondary_hold_spinloop);
unsigned long *acknowledge
= (void *) LOW_ADDR(__secondary_hold_acknowledge);
-#ifdef CONFIG_PPC64
- /* __secondary_hold is actually a descriptor, not the text address */
- unsigned long secondary_hold
- = __pa(*PTRRELOC((unsigned long *)__secondary_hold));
-#else
unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
-#endif
prom_debug("prom_hold_cpus: start...\n");
prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop);
@@ -2315,13 +2309,14 @@ static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
unsigned long __init prom_init(unsigned long r3, unsigned long r4,
unsigned long pp,
- unsigned long r6, unsigned long r7)
+ unsigned long r6, unsigned long r7,
+ unsigned long kbase)
{
struct prom_t *_prom;
unsigned long hdr;
- unsigned long offset = reloc_offset();
#ifdef CONFIG_PPC32
+ unsigned long offset = reloc_offset();
reloc_got2(offset);
#endif
@@ -2355,9 +2350,11 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
*/
RELOC(of_platform) = prom_find_machine_type();
+#ifndef CONFIG_RELOCATABLE
/* Bail if this is a kdump kernel. */
if (PHYSICAL_START > 0)
prom_panic("Error: You can't boot a kdump kernel from OF!\n");
+#endif
/*
* Check for an initrd
@@ -2377,7 +2374,7 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
* Copy the CPU hold code
*/
if (RELOC(of_platform) != PLATFORM_POWERMAC)
- copy_and_flush(0, KERNELBASE + offset, 0x100, 0);
+ copy_and_flush(0, kbase, 0x100, 0);
/*
* Do early parsing of command line
@@ -2480,7 +2477,7 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
reloc_got2(-offset);
#endif
- __start(hdr, KERNELBASE + offset, 0);
+ __start(hdr, kbase, 0);
return 0;
}
diff --git a/arch/powerpc/kernel/reloc_64.S b/arch/powerpc/kernel/reloc_64.S
new file mode 100644
index 00000000000..b47a0e1ab00
--- /dev/null
+++ b/arch/powerpc/kernel/reloc_64.S
@@ -0,0 +1,87 @@
+/*
+ * Code to process dynamic relocations in the kernel.
+ *
+ * Copyright 2008 Paul Mackerras, IBM Corp.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <asm/ppc_asm.h>
+
+RELA = 7
+RELACOUNT = 0x6ffffff9
+R_PPC64_RELATIVE = 22
+
+/*
+ * r3 = desired final address of kernel
+ */
+_GLOBAL(relocate)
+ mflr r0
+ bcl 20,31,$+4
+0: mflr r12 /* r12 has runtime addr of label 0 */
+ mtlr r0
+ ld r11,(p_dyn - 0b)(r12)
+ add r11,r11,r12 /* r11 has runtime addr of .dynamic section */
+ ld r9,(p_rela - 0b)(r12)
+ add r9,r9,r12 /* r9 has runtime addr of .rela.dyn section */
+ ld r10,(p_st - 0b)(r12)
+ add r10,r10,r12 /* r10 has runtime addr of _stext */
+
+ /*
+ * Scan the dynamic section for the RELA and RELACOUNT entries.
+ */
+ li r7,0
+ li r8,0
+1: ld r6,0(r11) /* get tag */
+ cmpdi r6,0
+ beq 4f /* end of list */
+ cmpdi r6,RELA
+ bne 2f
+ ld r7,8(r11) /* get RELA pointer in r7 */
+ b 3f
+2: addis r6,r6,(-RELACOUNT)@ha
+ cmpdi r6,RELACOUNT@l
+ bne 3f
+ ld r8,8(r11) /* get RELACOUNT value in r8 */
+3: addi r11,r11,16
+ b 1b
+4: cmpdi r7,0 /* check we have both RELA and RELACOUNT */
+ cmpdi cr1,r8,0
+ beq 6f
+ beq cr1,6f
+
+ /*
+ * Work out linktime address of _stext and hence the
+ * relocation offset to be applied.
+ * cur_offset [r7] = rela.run [r9] - rela.link [r7]
+ * _stext.link [r10] = _stext.run [r10] - cur_offset [r7]
+ * final_offset [r3] = _stext.final [r3] - _stext.link [r10]
+ */
+ subf r7,r7,r9 /* cur_offset */
+ subf r10,r7,r10
+ subf r3,r10,r3 /* final_offset */
+
+ /*
+ * Run through the list of relocations and process the
+ * R_PPC64_RELATIVE ones.
+ */
+ mtctr r8
+5: lwz r0,12(9) /* ELF64_R_TYPE(reloc->r_info) */
+ cmpwi r0,R_PPC64_RELATIVE
+ bne 6f
+ ld r6,0(r9) /* reloc->r_offset */
+ ld r0,16(r9) /* reloc->r_addend */
+ add r0,r0,r3
+ stdx r0,r7,r6
+ addi r9,r9,24
+ bdnz 5b
+
+6: blr
+
+p_dyn: .llong __dynamic_start - 0b
+p_rela: .llong __rela_dyn_start - 0b
+p_st: .llong _stext - 0b
+
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 9cc5a52711e..5ec56ff03e8 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -254,8 +254,21 @@ static int show_cpuinfo(struct seq_file *m, void *v)
/* If we are a Freescale core do a simple check so
* we dont have to keep adding cases in the future */
if (PVR_VER(pvr) & 0x8000) {
- maj = PVR_MAJ(pvr);
- min = PVR_MIN(pvr);
+ switch (PVR_VER(pvr)) {
+ case 0x8000: /* 7441/7450/7451, Voyager */
+ case 0x8001: /* 7445/7455, Apollo 6 */
+ case 0x8002: /* 7447/7457, Apollo 7 */
+ case 0x8003: /* 7447A, Apollo 7 PM */
+ case 0x8004: /* 7448, Apollo 8 */
+ case 0x800c: /* 7410, Nitro */
+ maj = ((pvr >> 8) & 0xF);
+ min = PVR_MIN(pvr);
+ break;
+ default: /* e500/book-e */
+ maj = PVR_MAJ(pvr);
+ min = PVR_MIN(pvr);
+ break;
+ }
} else {
switch (PVR_VER(pvr)) {
case 0x0020: /* 403 family */
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 8b25f51f03b..843c0af210d 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -255,9 +255,11 @@ void early_setup_secondary(void)
#endif /* CONFIG_SMP */
#if defined(CONFIG_SMP) || defined(CONFIG_KEXEC)
+extern unsigned long __secondary_hold_spinloop;
+extern void generic_secondary_smp_init(void);
+
void smp_release_cpus(void)
{
- extern unsigned long __secondary_hold_spinloop;
unsigned long *ptr;
DBG(" -> smp_release_cpus()\n");
@@ -266,12 +268,11 @@ void smp_release_cpus(void)
* all now so they can start to spin on their individual paca
* spinloops. For non SMP kernels, the secondary cpus never get out
* of the common spinloop.
- * This is useless but harmless on iSeries, secondaries are already
- * waiting on their paca spinloops. */
+ */
ptr = (unsigned long *)((unsigned long)&__secondary_hold_spinloop
- PHYSICAL_START);
- *ptr = 1;
+ *ptr = __pa(generic_secondary_smp_init);
mb();
DBG(" <- smp_release_cpus()\n");
diff --git a/arch/powerpc/kernel/sys_ppc32.c b/arch/powerpc/kernel/sys_ppc32.c
index d98634c7606..ff7de7b0797 100644
--- a/arch/powerpc/kernel/sys_ppc32.c
+++ b/arch/powerpc/kernel/sys_ppc32.c
@@ -107,14 +107,6 @@ asmlinkage long compat_sys_sysfs(u32 option, u32 arg1, u32 arg2)
return sys_sysfs((int)option, arg1, arg2);
}
-asmlinkage long compat_sys_pause(void)
-{
- current->state = TASK_INTERRUPTIBLE;
- schedule();
-
- return -ERESTARTNOHAND;
-}
-
static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
{
long usec;
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 4a8ce62fe11..e6927fb2e65 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -66,11 +66,12 @@ SECTIONS
__got2_end = .;
#endif /* CONFIG_PPC32 */
- . = ALIGN(PAGE_SIZE);
- _etext = .;
- PROVIDE32 (etext = .);
} :kernel
+ . = ALIGN(PAGE_SIZE);
+ _etext = .;
+ PROVIDE32 (etext = .);
+
/* Read-only data */
RODATA
@@ -186,6 +187,21 @@ SECTIONS
*(.machine.desc)
__machine_desc_end = . ;
}
+ . = ALIGN(8);
+ .dynsym : AT(ADDR(.dynsym) - LOAD_OFFSET) { *(.dynsym) }
+ .dynstr : AT(ADDR(.dynstr) - LOAD_OFFSET) { *(.dynstr) }
+ .dynamic : AT(ADDR(.dynamic) - LOAD_OFFSET)
+ {
+ __dynamic_start = .;
+ *(.dynamic)
+ }
+ .hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) }
+ .interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) }
+ .rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET)
+ {
+ __rela_dyn_start = .;
+ *(.rela*)
+ }
/* freed after init ends here */
. = ALIGN(PAGE_SIZE);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-28 08:46:19 +0000