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| author |   David Gibson <david@gibson.dropbear.id.au> | 2006-01-13 10:26:42 +1100 |
|---|---|---|
| committer |   Paul Mackerras <paulus@samba.org> | 2006-01-13 21:17:39 +1100 |
| commit | 3356bb9f7ba378a6e2709f9df95f4ea52111f4df (patch) | |
| tree | 84f370df6e58cec63132f9acce492d585226e671 /arch/powerpc/kernel/head_64.S | |
| parent | [PATCH] powerpc: Cleanup LOADADDR etc. asm macros (diff) | |
| download | linux-dev-3356bb9f7ba378a6e2709f9df95f4ea52111f4df.tar.xz linux-dev-3356bb9f7ba378a6e2709f9df95f4ea52111f4df.zip | |
[PATCH] powerpc: Remove lppaca structure from the PACA
At present the lppaca - the structure shared with the iSeries
hypervisor and phyp - is contained within the PACA, our own low-level
per-cpu structure. This doesn't have to be so, the patch below
removes it, making a separate array of lppaca structures.
This saves approximately 500*NR_CPUS bytes of image size and kernel
memory, because we don't need aligning gap between the Linux and
hypervisor portions of every PACA. On the other hand it means an
extra level of dereference in many accesses to the lppaca.
The patch also gets rid of several places where we assign the paca
address to a local variable for no particular reason.
Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/head_64.S')
| -rw-r--r-- | arch/powerpc/kernel/head_64.S | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index b3718f3eb7b5..308268466342 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -255,8 +255,9 @@ exception_marker: #define EXCEPTION_PROLOG_ISERIES_2 \ mfmsr r10; \ - ld r11,PACALPPACA+LPPACASRR0(r13); \ - ld r12,PACALPPACA+LPPACASRR1(r13); \ + ld r12,PACALPPACAPTR(r13); \ + ld r11,LPPACASRR0(r12); \ + ld r12,LPPACASRR1(r12); \ ori r10,r10,MSR_RI; \ mtmsrd r10,1 @@ -635,7 +636,8 @@ data_access_slb_iSeries: std r12,PACA_EXSLB+EX_R12(r13) mfspr r10,SPRN_SPRG1 std r10,PACA_EXSLB+EX_R13(r13) - ld r12,PACALPPACA+LPPACASRR1(r13); + ld r12,PACALPPACAPTR(r13) + ld r12,LPPACASRR1(r12) b .slb_miss_realmode STD_EXCEPTION_ISERIES(0x400, instruction_access, PACA_EXGEN) @@ -645,7 +647,8 @@ instruction_access_slb_iSeries: mtspr SPRN_SPRG1,r13 /* save r13 */ mfspr r13,SPRN_SPRG3 /* get paca address into r13 */ std r3,PACA_EXSLB+EX_R3(r13) - ld r3,PACALPPACA+LPPACASRR0(r13) /* get SRR0 value */ + ld r3,PACALPPACAPTR(r13) + ld r3,LPPACASRR0(r3) /* get SRR0 value */ std r9,PACA_EXSLB+EX_R9(r13) mfcr r9 #ifdef __DISABLED__ @@ -657,7 +660,8 @@ instruction_access_slb_iSeries: std r12,PACA_EXSLB+EX_R12(r13) mfspr r10,SPRN_SPRG1 std r10,PACA_EXSLB+EX_R13(r13) - ld r12,PACALPPACA+LPPACASRR1(r13); + ld r12,PACALPPACAPTR(r13) + ld r12,LPPACASRR1(r12) b .slb_miss_realmode #ifdef __DISABLED__ @@ -746,7 +750,8 @@ iSeries_secondary_smp_loop: .globl decrementer_iSeries_masked decrementer_iSeries_masked: li r11,1 - stb r11,PACALPPACA+LPPACADECRINT(r13) + ld r12,PACALPPACAPTR(r13) + stb r11,LPPACADECRINT(r12) LOAD_REG_ADDRBASE(r12,tb_ticks_per_jiffy) lwz r12,ADDROFF(tb_ticks_per_jiffy)(r12) mtspr SPRN_DEC,r12 @@ -755,8 +760,9 @@ decrementer_iSeries_masked: .globl hardware_interrupt_iSeries_masked hardware_interrupt_iSeries_masked: mtcrf 0x80,r9 /* Restore regs */ - ld r11,PACALPPACA+LPPACASRR0(r13) - ld r12,PACALPPACA+LPPACASRR1(r13) + ld r12,PACALPPACAPTR(r13) + ld r11,LPPACASRR0(r12) + ld r12,LPPACASRR1(r12) mtspr SPRN_SRR0,r11 mtspr SPRN_SRR1,r12 ld r9,PACA_EXGEN+EX_R9(r13) @@ -995,7 +1001,8 @@ _GLOBAL(slb_miss_realmode) 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 */ + ld r11,PACALPPACAPTR(r13) + ld r11,LPPACASRR0(r11) /* get SRR0 value */ #endif /* CONFIG_PPC_ISERIES */ mtlr r10 |