diff options
| author | David S. Miller <davem@davemloft.net> | 2009-04-01 12:47:10 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-06-16 15:56:11 +0400 |
| commit | 5a5488d3bb9a23d9884572e5d85dfeefe8749d3d (patch) | |
| tree | afa8db75cdf771257cd5541ed80a606df60f9cf8 /arch/sparc/include | |
| parent | 19f0fa3fb3499d8c5fb861933959f546d05fc202 (diff) | |
| download | linux-5a5488d3bb9a23d9884572e5d85dfeefe8749d3d.tar.xz | |
sparc64: Store per-cpu offset in trap_block[]
Surprisingly this actually makes LOAD_PER_CPU_BASE() a little
more efficient.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/include')
| -rw-r--r-- | arch/sparc/include/asm/percpu_64.h | 6 | ||||
| -rw-r--r-- | arch/sparc/include/asm/trap_block.h | 14 |
2 files changed, 10 insertions, 10 deletions
diff --git a/arch/sparc/include/asm/percpu_64.h b/arch/sparc/include/asm/percpu_64.h index bee64593023e..c0ab102d11f6 100644 --- a/arch/sparc/include/asm/percpu_64.h +++ b/arch/sparc/include/asm/percpu_64.h @@ -7,12 +7,12 @@ register unsigned long __local_per_cpu_offset asm("g5"); #ifdef CONFIG_SMP +#include <asm/trap_block.h> + extern void real_setup_per_cpu_areas(void); -extern unsigned long __per_cpu_base; -extern unsigned long __per_cpu_shift; #define __per_cpu_offset(__cpu) \ - (__per_cpu_base + ((unsigned long)(__cpu) << __per_cpu_shift)) + (trap_block[(__cpu)].__per_cpu_base) #define per_cpu_offset(x) (__per_cpu_offset(x)) #define __my_cpu_offset __local_per_cpu_offset diff --git a/arch/sparc/include/asm/trap_block.h b/arch/sparc/include/asm/trap_block.h index 68fd9ee3e8ae..7e26b2db6211 100644 --- a/arch/sparc/include/asm/trap_block.h +++ b/arch/sparc/include/asm/trap_block.h @@ -48,7 +48,7 @@ struct trap_per_cpu { unsigned int dev_mondo_qmask; unsigned int resum_qmask; unsigned int nonresum_qmask; - unsigned long __unused; + unsigned long __per_cpu_base; } __attribute__((aligned(64))); extern struct trap_per_cpu trap_block[NR_CPUS]; extern void init_cur_cpu_trap(struct thread_info *); @@ -101,6 +101,7 @@ extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch, #define TRAP_PER_CPU_DEV_MONDO_QMASK 0xec #define TRAP_PER_CPU_RESUM_QMASK 0xf0 #define TRAP_PER_CPU_NONRESUM_QMASK 0xf4 +#define TRAP_PER_CPU_PER_CPU_BASE 0xf8 #define TRAP_BLOCK_SZ_SHIFT 8 @@ -172,12 +173,11 @@ extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch, */ #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3) \ lduh [THR + TI_CPU], REG1; \ - sethi %hi(__per_cpu_shift), REG3; \ - sethi %hi(__per_cpu_base), REG2; \ - ldx [REG3 + %lo(__per_cpu_shift)], REG3; \ - ldx [REG2 + %lo(__per_cpu_base)], REG2; \ - sllx REG1, REG3, REG3; \ - add REG3, REG2, DEST; + sethi %hi(trap_block), REG2; \ + sllx REG1, TRAP_BLOCK_SZ_SHIFT, REG1; \ + or REG2, %lo(trap_block), REG2; \ + add REG2, REG1, REG2; \ + ldx [REG2 + TRAP_PER_CPU_PER_CPU_BASE], DEST; #else |