Relocation support
This patch changes all LOAD_REG_ADDR macro calls to LOAD_REG_IMMEDIATE
to make sure that we load the correct address. It also takes care of
when accessing absolute symbols in the code by adding the relocation
kernel base address.
Signed-off-by: Mohan Kumar M <[EMAIL PROTECTED]>
---
arch/powerpc/kernel/crash_dump.c | 22 +++++++++++
arch/powerpc/kernel/entry_64.S | 4 +-
arch/powerpc/kernel/head_64.S | 63 ++++++++++++++++++++++++++++----
arch/powerpc/kernel/iommu.c | 7 +++
arch/powerpc/kernel/machine_kexec.c | 5 ++
arch/powerpc/kernel/machine_kexec_64.c | 4 +-
arch/powerpc/kernel/misc.S | 40 ++++++++++++++++----
arch/powerpc/kernel/prom.c | 14 ++++++-
arch/powerpc/kernel/prom_init.c | 32 +++++++++++++---
arch/powerpc/kernel/prom_init_check.sh | 2 -
arch/powerpc/kernel/setup_64.c | 5 +-
arch/powerpc/mm/hash_low_64.S | 8 ++--
arch/powerpc/mm/init_64.c | 7 ++-
arch/powerpc/mm/mem.c | 3 +
arch/powerpc/mm/slb_low.S | 2 -
arch/powerpc/platforms/pseries/hvCall.S | 2 -
arch/powerpc/platforms/pseries/iommu.c | 5 ++
include/asm-powerpc/exception.h | 6 ---
include/asm-powerpc/prom.h | 2 +
include/asm-powerpc/sections.h | 4 +-
include/asm-powerpc/system.h | 5 ++
21 files changed, 194 insertions(+), 48 deletions(-)
Index: linux-2.6.26-rc9/arch/powerpc/kernel/crash_dump.c
===================================================================
--- linux-2.6.26-rc9.orig/arch/powerpc/kernel/crash_dump.c
+++ linux-2.6.26-rc9/arch/powerpc/kernel/crash_dump.c
@@ -28,7 +28,15 @@
void __init reserve_kdump_trampoline(void)
{
+#ifdef CONFIG_RELOCATABLE_PPC64
+ if (RELOC(reloc_delta)) {
+ lmb_reserve(0, KDUMP_RESERVE_LIMIT);
+ printk("Reserving from 0 of size %lx\n", KDUMP_RESERVE_LIMIT);
+ }
+#else
lmb_reserve(0, KDUMP_RESERVE_LIMIT);
+ printk("Reserving from 0 of size %lx\n", KDUMP_RESERVE_LIMIT);
+#endif
}
static void __init create_trampoline(unsigned long addr)
@@ -42,7 +50,11 @@ static void __init create_trampoline(uns
* two instructions it doesn't require any registers.
*/
create_instruction(addr, 0x60000000); /* nop */
+#ifndef CONFIG_RELOCATABLE_PPC64
create_branch(addr + 4, addr + PHYSICAL_START, 0);
+#else
+ create_branch(addr + 4, addr + RELOC(reloc_delta), 0);
+#endif
}
void __init setup_kdump_trampoline(void)
@@ -51,13 +63,23 @@ void __init setup_kdump_trampoline(void)
DBG(" -> setup_kdump_trampoline()\n");
+#ifdef CONFIG_RELOCATABLE_PPC64
+ if (!RELOC(reloc_delta))
+ return;
+#endif
+
for (i = KDUMP_TRAMPOLINE_START; i < KDUMP_TRAMPOLINE_END; i += 8) {
create_trampoline(i);
}
#ifdef CONFIG_PPC_PSERIES
+#ifndef CONFIG_RELOCATABLE_PPC64
create_trampoline(__pa(system_reset_fwnmi) - PHYSICAL_START);
create_trampoline(__pa(machine_check_fwnmi) - PHYSICAL_START);
+#else
+ create_trampoline(__pa(system_reset_fwnmi) - RELOC(reloc_delta));
+ create_trampoline(__pa(machine_check_fwnmi) - RELOC(reloc_delta));
+#endif
#endif /* CONFIG_PPC_PSERIES */
DBG(" <- setup_kdump_trampoline()\n");
Index: linux-2.6.26-rc9/arch/powerpc/kernel/entry_64.S
===================================================================
--- linux-2.6.26-rc9.orig/arch/powerpc/kernel/entry_64.S
+++ linux-2.6.26-rc9/arch/powerpc/kernel/entry_64.S
@@ -709,7 +709,7 @@ _GLOBAL(enter_rtas)
std r6,PACASAVEDMSR(r13)
/* Setup our real return addr */
- LOAD_REG_ADDR(r4,.rtas_return_loc)
+ LOAD_REG_IMMEDIATE(r4,.rtas_return_loc)
clrldi r4,r4,2 /* convert to realmode address */
mtlr r4
@@ -725,7 +725,7 @@ _GLOBAL(enter_rtas)
sync /* disable interrupts so SRR0/1 */
mtmsrd r0 /* don't get trashed */
- LOAD_REG_ADDR(r4, rtas)
+ LOAD_REG_IMMEDIATE(r4, rtas)
ld r5,RTASENTRY(r4) /* get the rtas->entry value */
ld r4,RTASBASE(r4) /* get the rtas->base value */
Index: linux-2.6.26-rc9/arch/powerpc/kernel/head_64.S
===================================================================
--- linux-2.6.26-rc9.orig/arch/powerpc/kernel/head_64.S
+++ linux-2.6.26-rc9/arch/powerpc/kernel/head_64.S
@@ -102,6 +102,12 @@ __secondary_hold_acknowledge:
.llong hvReleaseData-KERNELBASE
#endif /* CONFIG_PPC_ISERIES */
+#ifdef CONFIG_RELOCATABLE_PPC64
+ /* Used as static variable to initialize the reloc_delta */
+__initialized:
+ .long 0x0
+#endif
+
. = 0x60
/*
* The following code is used to hold secondary processors
@@ -121,11 +127,13 @@ _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,[EMAIL PROTECTED](0)
+ LOAD_REG_IMMEDIATE(r25, __secondary_hold_acknowledge)
+ std r24,0(r25)
sync
/* All secondary cpus wait here until told to start. */
-100: ld r4,[EMAIL PROTECTED](0)
+ LOAD_REG_IMMEDIATE(r25, __secondary_hold_spinloop)
+100: ld r4,0(r25)
cmpdi 0,r4,1
bne 100b
@@ -1176,6 +1184,38 @@ _STATIC(__mmu_off)
*
*/
_GLOBAL(__start_initialization_multiplatform)
+#ifdef CONFIG_RELOCATABLE_PPC64
+ mr r21,r3
+ mr r22,r4
+ mr r23,r5
+ bl .reloc_offset
+ mr r26,r3
+ mr r3,r21
+ mr r4,r22
+ mr r5,r23
+
+ LOAD_REG_IMMEDIATE(r27, __initialized)
+ add r27,r26,r27
+ ld r7,0(r27)
+ cmpdi r7,0
+ bne 4f
+
+ li r7,1
+ stw r7,0(r27)
+
+ cmpdi r6,0
+ beq 4f
+ LOAD_REG_IMMEDIATE(r27, reloc_delta)
+ add r27,r27,r26
+ std r6,0(r27)
+
+ LOAD_REG_IMMEDIATE(r27, KERNELBASE)
+ add r7,r6,r27
+ LOAD_REG_IMMEDIATE(r27, kernel_base)
+ add r27,r27,r26
+ std r7,0(r27)
+4:
+#endif
/*
* Are we booted from a PROM Of-type client-interface ?
*/
@@ -1251,6 +1291,19 @@ _INIT_STATIC(__boot_from_prom)
trap
_STATIC(__after_prom_start)
+ bl .reloc_offset
+ mr r26,r3
+#ifdef CONFIG_RELOCATABLE_PPC64
+ /*
+ * If its a relocatable kernel, no need to copy the kernel
+ * to PHYSICAL_START. Continue running from the same location
+ */
+ LOAD_REG_IMMEDIATE(r27, reloc_delta)
+ add r27,r27,r26
+ ld r28,0(r27)
+ cmpdi r28,0
+ bne .start_here_multiplatform
+#endif
/*
* We need to run with __start at physical address PHYSICAL_START.
@@ -1264,8 +1317,6 @@ _STATIC(__after_prom_start)
* r26 == relocation offset
* r27 == KERNELBASE
*/
- bl .reloc_offset
- mr r26,r3
LOAD_REG_IMMEDIATE(r27, KERNELBASE)
LOAD_REG_IMMEDIATE(r3, PHYSICAL_START) /* target addr */
@@ -1411,7 +1462,7 @@ __secondary_start:
bl .early_setup_secondary
/* Initialize the kernel stack. Just a repeat for iSeries. */
- LOAD_REG_ADDR(r3, current_set)
+ LOAD_REG_IMMEDIATE(r3, current_set)
sldi r28,r24,3 /* get current_set[cpu#] */
ldx r1,r3,r28
addi r1,r1,THREAD_SIZE-STACK_FRAME_OVERHEAD
@@ -1422,7 +1473,7 @@ __secondary_start:
mtlr r7
/* enable MMU and jump to start_secondary */
- LOAD_REG_ADDR(r3, .start_secondary_prolog)
+ LOAD_REG_IMMEDIATE(r3, .start_secondary_prolog)
LOAD_REG_IMMEDIATE(r4, MSR_KERNEL)
#ifdef CONFIG_PPC_ISERIES
BEGIN_FW_FTR_SECTION
Index: linux-2.6.26-rc9/arch/powerpc/kernel/machine_kexec.c
===================================================================
--- linux-2.6.26-rc9.orig/arch/powerpc/kernel/machine_kexec.c
+++ linux-2.6.26-rc9/arch/powerpc/kernel/machine_kexec.c
@@ -67,6 +67,11 @@ void __init reserve_crashkernel(void)
unsigned long long crash_size, crash_base;
int ret;
+#ifdef CONFIG_RELOCATABLE_PPC64
+ if (reloc_delta)
+ return;
+#endif
+
/* this is necessary because of lmb_phys_mem_size() */
lmb_analyze();
Index: linux-2.6.26-rc9/arch/powerpc/kernel/machine_kexec_64.c
===================================================================
--- linux-2.6.26-rc9.orig/arch/powerpc/kernel/machine_kexec_64.c
+++ linux-2.6.26-rc9/arch/powerpc/kernel/machine_kexec_64.c
@@ -43,7 +43,7 @@ int default_machine_kexec_prepare(struct
* overlaps kernel static data or bss.
*/
for (i = 0; i < image->nr_segments; i++)
- if (image->segment[i].mem < __pa(_end))
+ if (image->segment[i].mem < (__pa(_end) + kernel_base))
return -ETXTBSY;
/*
@@ -317,7 +317,7 @@ static void __init export_htab_values(vo
if (!node)
return;
- kernel_end = __pa(_end);
+ kernel_end = __pa(_end) + kernel_base;
prom_add_property(node, &kernel_end_prop);
/* On machines with no htab htab_address is NULL */
Index: linux-2.6.26-rc9/arch/powerpc/kernel/misc.S
===================================================================
--- linux-2.6.26-rc9.orig/arch/powerpc/kernel/misc.S
+++ linux-2.6.26-rc9/arch/powerpc/kernel/misc.S
@@ -20,6 +20,8 @@
#include <asm/asm-compat.h>
#include <asm/asm-offsets.h>
+#define RELOC_DELTA 0x4000000002000000
+
.text
/*
@@ -33,6 +35,17 @@ _GLOBAL(reloc_offset)
1: mflr r3
LOAD_REG_IMMEDIATE(r4,1b)
subf r3,r4,r3
+#ifdef CONFIG_RELOCATABLE_PPC64
+ LOAD_REG_IMMEDIATE(r5, RELOC_DELTA)
+ cmpd r3,r5
+ bne 2f
+ /*
+ * Don't return the offset if the difference is
+ * RELOC_DELTA
+ */
+ li r3,0
+2:
+#endif
mtlr r0
blr
@@ -40,14 +53,25 @@ _GLOBAL(reloc_offset)
* add_reloc_offset(x) returns x + reloc_offset().
*/
_GLOBAL(add_reloc_offset)
- mflr r0
- bl 1f
-1: mflr r5
- LOAD_REG_IMMEDIATE(r4,1b)
- subf r5,r4,r5
- add r3,r3,r5
- mtlr r0
- blr
+ mflr r0
+ bl 1f
+1: mflr r5
+ LOAD_REG_IMMEDIATE(r4,1b)
+ subf r5,r4,r5
+#ifdef CONFIG_RELOCATABLE_PPC64
+ LOAD_REG_IMMEDIATE(r4, RELOC_DELTA)
+ cmpd r5,r4
+ bne 2f
+ /*
+ * Don't add the offset if the difference is
+ * RELOC_DELTA
+ */
+ li r5,0
+2:
+#endif
+ add r3,r3,r5
+ mtlr r0
+ blr
_GLOBAL(kernel_execve)
li r0,__NR_execve
Index: linux-2.6.26-rc9/arch/powerpc/kernel/prom.c
===================================================================
--- linux-2.6.26-rc9.orig/arch/powerpc/kernel/prom.c
+++ linux-2.6.26-rc9/arch/powerpc/kernel/prom.c
@@ -65,6 +65,9 @@
static int __initdata dt_root_addr_cells;
static int __initdata dt_root_size_cells;
+unsigned long reloc_delta __attribute__ ((__section__ (".data")));
+unsigned long kernel_base __attribute__ ((__section__ (".data")));
+
#ifdef CONFIG_PPC64
int __initdata iommu_is_off;
int __initdata iommu_force_on;
@@ -1125,7 +1128,6 @@ static void __init phyp_dump_reserve_mem
static inline void __init phyp_dump_reserve_mem(void) {}
#endif /* CONFIG_PHYP_DUMP && CONFIG_PPC_RTAS */
-
void __init early_init_devtree(void *params)
{
DBG(" -> early_init_devtree(%p)\n", params);
@@ -1159,8 +1161,16 @@ void __init early_init_devtree(void *par
parse_early_param();
/* Reserve LMB regions used by kernel, initrd, dt, etc... */
- lmb_reserve(PHYSICAL_START, __pa(klimit) - PHYSICAL_START);
reserve_kdump_trampoline();
+#ifdef CONFIG_RELOCATABLE_PPC64
+ if (RELOC(kernel_base)) {
+ lmb_reserve(0, KDUMP_RESERVE_LIMIT);
+ lmb_reserve(kernel_base, __pa(klimit) - PHYSICAL_START);
+ } else
+ lmb_reserve(PHYSICAL_START, __pa(klimit) - PHYSICAL_START);
+#else
+ lmb_reserve(PHYSICAL_START, __pa(klimit) - PHYSICAL_START);
+#endif
reserve_crashkernel();
early_reserve_mem();
phyp_dump_reserve_mem();
Index: linux-2.6.26-rc9/arch/powerpc/kernel/prom_init.c
===================================================================
--- linux-2.6.26-rc9.orig/arch/powerpc/kernel/prom_init.c
+++ linux-2.6.26-rc9/arch/powerpc/kernel/prom_init.c
@@ -91,11 +91,9 @@ extern const struct linux_logo logo_linu
* fortunately don't get interpreted as two arguments).
*/
#ifdef CONFIG_PPC64
-#define RELOC(x) (*PTRRELOC(&(x)))
#define ADDR(x) (u32) add_reloc_offset((unsigned long)(x))
#define OF_WORKAROUNDS 0
#else
-#define RELOC(x) (x)
#define ADDR(x) (u32) (x)
#define OF_WORKAROUNDS of_workarounds
int of_workarounds;
@@ -110,6 +108,9 @@ int of_workarounds;
__asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \
} while (0)
+
+#define DEBUG_PROM
+
#ifdef DEBUG_PROM
#define prom_debug(x...) prom_printf(x)
#else
@@ -1070,7 +1071,12 @@ static void __init prom_init_mem(void)
}
}
+#ifndef CONFIG_RELOCATABLE_PPC64
RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000);
+#else
+ RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000 +
+ RELOC(reloc_delta));
+#endif
/* Check if we have an initrd after the kernel, if we do move our bottom
* point to after it
@@ -1321,7 +1327,7 @@ extern unsigned long __secondary_hold_ac
* We want to reference the copy of __secondary_hold_* in the
* 0 - 0x100 address range
*/
-#define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
+#define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
static void __init prom_hold_cpus(void)
{
@@ -1334,10 +1340,19 @@ static void __init prom_hold_cpus(void)
unsigned int cpu_threads, hw_cpu_num;
int propsize;
struct prom_t *_prom = &RELOC(prom);
+
+#ifndef CONFIG_RELOCATABLE_PPC64
unsigned long *spinloop
= (void *) LOW_ADDR(__secondary_hold_spinloop);
unsigned long *acknowledge
= (void *) LOW_ADDR(__secondary_hold_acknowledge);
+#else
+ unsigned long *spinloop
+ = (void *) &__secondary_hold_spinloop;
+ unsigned long *acknowledge
+ = (void *) &__secondary_hold_acknowledge;
+#endif
+
#ifdef CONFIG_PPC64
/* __secondary_hold is actually a descriptor, not the text address */
unsigned long secondary_hold
@@ -2399,8 +2414,15 @@ unsigned long __init prom_init(unsigned
/*
* Copy the CPU hold code
*/
- if (RELOC(of_platform) != PLATFORM_POWERMAC)
- copy_and_flush(0, KERNELBASE + offset, 0x100, 0);
+ if (RELOC(of_platform) != PLATFORM_POWERMAC) {
+#ifdef CONFIG_RELOCATABLE_PPC64
+ if (RELOC(reloc_delta))
+ copy_and_flush(0, KERNELBASE + RELOC(reloc_delta),
+ 0x100, 0);
+ else
+#endif
+ copy_and_flush(0, KERNELBASE + offset, 0x100, 0);
+ }
/*
* Do early parsing of command line
Index: linux-2.6.26-rc9/arch/powerpc/kernel/prom_init_check.sh
===================================================================
--- linux-2.6.26-rc9.orig/arch/powerpc/kernel/prom_init_check.sh
+++ linux-2.6.26-rc9/arch/powerpc/kernel/prom_init_check.sh
@@ -20,7 +20,7 @@ WHITELIST="add_reloc_offset __bss_start
_end enter_prom memcpy memset reloc_offset __secondary_hold
__secondary_hold_acknowledge __secondary_hold_spinloop __start
strcmp strcpy strlcpy strlen strncmp strstr logo_linux_clut224
-reloc_got2 kernstart_addr"
+reloc_got2 kernstart_addr reloc_delta"
NM="$1"
OBJ="$2"
Index: linux-2.6.26-rc9/arch/powerpc/kernel/setup_64.c
===================================================================
--- linux-2.6.26-rc9.orig/arch/powerpc/kernel/setup_64.c
+++ linux-2.6.26-rc9/arch/powerpc/kernel/setup_64.c
@@ -208,7 +208,6 @@ void __init early_setup(unsigned long dt
/* Probe the machine type */
probe_machine();
-
setup_kdump_trampoline();
DBG("Found, Initializing memory management...\n");
@@ -524,9 +523,9 @@ void __init setup_arch(char **cmdline_p)
if (ppc_md.panic)
setup_panic();
- init_mm.start_code = (unsigned long)_stext;
+ init_mm.start_code = (unsigned long)_stext + kernel_base;
init_mm.end_code = (unsigned long) _etext;
- init_mm.end_data = (unsigned long) _edata;
+ init_mm.end_data = (unsigned long) _edata + kernel_base;
init_mm.brk = klimit;
irqstack_early_init();
Index: linux-2.6.26-rc9/arch/powerpc/mm/hash_low_64.S
===================================================================
--- linux-2.6.26-rc9.orig/arch/powerpc/mm/hash_low_64.S
+++ linux-2.6.26-rc9/arch/powerpc/mm/hash_low_64.S
@@ -83,7 +83,7 @@ _GLOBAL(__hash_page_4K)
std r29,STK_REG(r29)(r1)
std r30,STK_REG(r30)(r1)
std r31,STK_REG(r31)(r1)
-
+
/* Step 1:
*
* Check permissions, atomically mark the linux PTE busy
@@ -168,7 +168,7 @@ END_FTR_SECTION(CPU_FTR_NOEXECUTE|CPU_FT
std r3,STK_PARM(r4)(r1)
/* Get htab_hash_mask */
- ld r4,[EMAIL PROTECTED](2)
+ LOAD_REG_IMMEDIATE(r4, htab_hash_mask)
ld r27,0(r4) /* htab_hash_mask -> r27 */
/* Check if we may already be in the hashtable, in this case, we
@@ -461,7 +461,7 @@ END_FTR_SECTION(CPU_FTR_NOEXECUTE|CPU_FT
std r3,STK_PARM(r4)(r1)
/* Get htab_hash_mask */
- ld r4,[EMAIL PROTECTED](2)
+ LOAD_REG_IMMEDIATE(r4, htab_hash_mask)
ld r27,0(r4) /* htab_hash_mask -> r27 */
/* Check if we may already be in the hashtable, in this case, we
@@ -792,7 +792,7 @@ END_FTR_SECTION(CPU_FTR_NOEXECUTE|CPU_FT
std r3,STK_PARM(r4)(r1)
/* Get htab_hash_mask */
- ld r4,[EMAIL PROTECTED](2)
+ LOAD_REG_IMMEDIATE(r4, htab_hash_mask)
ld r27,0(r4) /* htab_hash_mask -> r27 */
/* Check if we may already be in the hashtable, in this case, we
Index: linux-2.6.26-rc9/arch/powerpc/mm/init_64.c
===================================================================
--- linux-2.6.26-rc9.orig/arch/powerpc/mm/init_64.c
+++ linux-2.6.26-rc9/arch/powerpc/mm/init_64.c
@@ -79,10 +79,11 @@ phys_addr_t kernstart_addr;
void free_initmem(void)
{
- unsigned long addr;
+ unsigned long long addr, eaddr;
- addr = (unsigned long)__init_begin;
- for (; addr < (unsigned long)__init_end; addr += PAGE_SIZE) {
+ addr = (unsigned long long )__init_begin + kernel_base;
+ eaddr = (unsigned long long ) __init_end + kernel_base;
+ for (; addr < eaddr; addr += PAGE_SIZE) {
memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
ClearPageReserved(virt_to_page(addr));
init_page_count(virt_to_page(addr));
Index: linux-2.6.26-rc9/arch/powerpc/mm/mem.c
===================================================================
--- linux-2.6.26-rc9.orig/arch/powerpc/mm/mem.c
+++ linux-2.6.26-rc9/arch/powerpc/mm/mem.c
@@ -400,7 +400,8 @@ void __init mem_init(void)
}
}
- codesize = (unsigned long)&_sdata - (unsigned long)&_stext;
+ codesize = (unsigned long)&_sdata - (unsigned long)&_stext
+ + kernel_base;
datasize = (unsigned long)&_edata - (unsigned long)&_sdata;
initsize = (unsigned long)&__init_end - (unsigned long)&__init_begin;
bsssize = (unsigned long)&__bss_stop - (unsigned long)&__bss_start;
Index: linux-2.6.26-rc9/arch/powerpc/mm/slb_low.S
===================================================================
--- linux-2.6.26-rc9.orig/arch/powerpc/mm/slb_low.S
+++ linux-2.6.26-rc9/arch/powerpc/mm/slb_low.S
@@ -128,7 +128,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_1T_SEGMENT
/* Now get to the array and obtain the sllp
*/
ld r11,PACATOC(r13)
- ld r11,[EMAIL PROTECTED](r11)
+ LOAD_REG_IMMEDIATE(r11, mmu_psize_defs)
add r11,r11,r9
ld r11,MMUPSIZESLLP(r11)
ori r11,r11,SLB_VSID_USER
Index: linux-2.6.26-rc9/arch/powerpc/platforms/pseries/hvCall.S
===================================================================
--- linux-2.6.26-rc9.orig/arch/powerpc/platforms/pseries/hvCall.S
+++ linux-2.6.26-rc9/arch/powerpc/platforms/pseries/hvCall.S
@@ -55,7 +55,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_PURR);
/* calculate address of stat structure r4 = opcode */ \
srdi r4,r4,2; /* index into array */ \
mulli r4,r4,HCALL_STAT_SIZE; \
- LOAD_REG_ADDR(r7, per_cpu__hcall_stats); \
+ LOAD_REG_IMMEDIATE(r7, per_cpu__hcall_stats); \
add r4,r4,r7; \
ld r7,PACA_DATA_OFFSET(r13); /* per cpu offset */ \
add r4,r4,r7; \
Index: linux-2.6.26-rc9/include/asm-powerpc/exception.h
===================================================================
--- linux-2.6.26-rc9.orig/include/asm-powerpc/exception.h
+++ linux-2.6.26-rc9/include/asm-powerpc/exception.h
@@ -47,12 +47,6 @@
#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 SET_REG_IMMEDIATE 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 ... */ \
Index: linux-2.6.26-rc9/include/asm-powerpc/system.h
===================================================================
--- linux-2.6.26-rc9.orig/include/asm-powerpc/system.h
+++ linux-2.6.26-rc9/include/asm-powerpc/system.h
@@ -517,6 +517,11 @@ extern unsigned long add_reloc_offset(un
extern void reloc_got2(unsigned long);
#define PTRRELOC(x) ((typeof(x)) add_reloc_offset((unsigned long)(x)))
+#ifdef CONFIG_PPC64
+#define RELOC(x) (*PTRRELOC(&(x)))
+#else
+#define RELOC(x) (x)
+#endif
static inline void create_instruction(unsigned long addr, unsigned int instr)
{
Index: linux-2.6.26-rc9/include/asm-powerpc/sections.h
===================================================================
--- linux-2.6.26-rc9.orig/include/asm-powerpc/sections.h
+++ linux-2.6.26-rc9/include/asm-powerpc/sections.h
@@ -7,10 +7,12 @@
#ifdef __powerpc64__
extern char _end[];
+extern unsigned long kernel_base;
static inline int in_kernel_text(unsigned long addr)
{
- if (addr >= (unsigned long)_stext && addr < (unsigned long)__init_end)
+ if (addr >= (unsigned long)_stext && addr < (unsigned long)__init_end
+ + kernel_base)
return 1;
return 0;
Index: linux-2.6.26-rc9/include/asm-powerpc/prom.h
===================================================================
--- linux-2.6.26-rc9.orig/include/asm-powerpc/prom.h
+++ linux-2.6.26-rc9/include/asm-powerpc/prom.h
@@ -39,6 +39,8 @@
#define OF_DT_VERSION 0x10
+extern unsigned long reloc_delta, kernel_base;
+
/*
* This is what gets passed to the kernel by prom_init or kexec
*
Index: linux-2.6.26-rc9/arch/powerpc/kernel/iommu.c
===================================================================
--- linux-2.6.26-rc9.orig/arch/powerpc/kernel/iommu.c
+++ linux-2.6.26-rc9/arch/powerpc/kernel/iommu.c
@@ -473,7 +473,7 @@ struct iommu_table *iommu_init_table(str
spin_lock_init(&tbl->it_lock);
#ifdef CONFIG_CRASH_DUMP
- if (ppc_md.tce_get) {
+ if (reloc_delta && ppc_md.tce_get) {
unsigned long index;
unsigned long tceval;
unsigned long tcecount = 0;
@@ -499,6 +499,11 @@ struct iommu_table *iommu_init_table(str
index < tbl->it_size; index++)
__clear_bit(index, tbl->it_map);
}
+ } else {
+ /* Clear the hardware table in case firmware left allocations
+ in it */
+ ppc_md.tce_free(tbl, tbl->it_offset, tbl->it_size);
+ printk("Called ppc_md.tce_free()\n");
}
#else
/* Clear the hardware table in case firmware left allocations in it */
Index: linux-2.6.26-rc9/arch/powerpc/platforms/pseries/iommu.c
===================================================================
--- linux-2.6.26-rc9.orig/arch/powerpc/platforms/pseries/iommu.c
+++ linux-2.6.26-rc9/arch/powerpc/platforms/pseries/iommu.c
@@ -262,7 +262,10 @@ static void iommu_table_setparms(struct
tbl->it_base = (unsigned long)__va(*basep);
-#ifndef CONFIG_CRASH_DUMP
+#ifdef CONFIG_CRASH_DUMP
+ if (!reloc_delta)
+ memset((void *)tbl->it_base, 0, *sizep);
+#else
memset((void *)tbl->it_base, 0, *sizep);
#endif
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