183 lines
5.1 KiB
C
183 lines
5.1 KiB
C
/* cpudata.h: Per-cpu parameters.
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*
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* Copyright (C) 2003, 2005, 2006 David S. Miller (davem@davemloft.net)
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*/
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#ifndef _SPARC64_CPUDATA_H
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#define _SPARC64_CPUDATA_H
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#ifndef __ASSEMBLY__
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#include <linux/percpu.h>
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#include <linux/threads.h>
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typedef struct {
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/* Dcache line 1 */
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unsigned int __softirq_pending; /* must be 1st, see rtrap.S */
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unsigned int multiplier;
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unsigned int counter;
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unsigned int idle_volume;
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unsigned long clock_tick; /* %tick's per second */
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unsigned long udelay_val;
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/* Dcache line 2, rarely used */
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unsigned int dcache_size;
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unsigned int dcache_line_size;
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unsigned int icache_size;
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unsigned int icache_line_size;
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unsigned int ecache_size;
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unsigned int ecache_line_size;
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unsigned int __pad3;
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unsigned int __pad4;
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} cpuinfo_sparc;
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DECLARE_PER_CPU(cpuinfo_sparc, __cpu_data);
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#define cpu_data(__cpu) per_cpu(__cpu_data, (__cpu))
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#define local_cpu_data() __get_cpu_var(__cpu_data)
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/* Trap handling code needs to get at a few critical values upon
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* trap entry and to process TSB misses. These cannot be in the
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* per_cpu() area as we really need to lock them into the TLB and
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* thus make them part of the main kernel image. As a result we
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* try to make this as small as possible.
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*
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* This is padded out and aligned to 64-bytes to avoid false sharing
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* on SMP.
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*/
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/* If you modify the size of this structure, please update
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* TRAP_BLOCK_SZ_SHIFT below.
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*/
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struct thread_info;
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struct trap_per_cpu {
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/* D-cache line 1 */
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struct thread_info *thread;
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unsigned long pgd_paddr;
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unsigned long __pad1[2];
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/* D-cache line 2 */
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unsigned long __pad2[4];
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} __attribute__((aligned(64)));
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extern struct trap_per_cpu trap_block[NR_CPUS];
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extern void init_cur_cpu_trap(void);
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extern void setup_tba(void);
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#ifdef CONFIG_SMP
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struct cpuid_patch_entry {
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unsigned int addr;
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unsigned int cheetah_safari[4];
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unsigned int cheetah_jbus[4];
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unsigned int starfire[4];
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unsigned int sun4v[4];
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};
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extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end;
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#endif
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#endif /* !(__ASSEMBLY__) */
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#define TRAP_PER_CPU_THREAD 0x00
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#define TRAP_PER_CPU_PGD_PADDR 0x08
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#define TRAP_BLOCK_SZ_SHIFT 6
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#include <asm/scratchpad.h>
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#ifdef CONFIG_SMP
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#define __GET_CPUID(REG) \
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/* Spitfire implementation (default). */ \
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661: ldxa [%g0] ASI_UPA_CONFIG, REG; \
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srlx REG, 17, REG; \
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and REG, 0x1f, REG; \
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nop; \
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.section .cpuid_patch, "ax"; \
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/* Instruction location. */ \
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.word 661b; \
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/* Cheetah Safari implementation. */ \
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ldxa [%g0] ASI_SAFARI_CONFIG, REG; \
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srlx REG, 17, REG; \
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and REG, 0x3ff, REG; \
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nop; \
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/* Cheetah JBUS implementation. */ \
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ldxa [%g0] ASI_JBUS_CONFIG, REG; \
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srlx REG, 17, REG; \
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and REG, 0x1f, REG; \
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nop; \
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/* Starfire implementation. */ \
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sethi %hi(0x1fff40000d0 >> 9), REG; \
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sllx REG, 9, REG; \
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or REG, 0xd0, REG; \
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lduwa [REG] ASI_PHYS_BYPASS_EC_E, REG;\
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/* sun4v implementation. */ \
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mov SCRATCHPAD_CPUID, REG; \
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nop; \
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ldxa [REG] ASI_SCRATCHPAD, REG; \
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nop; \
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.previous;
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/* Clobbers TMP, current address space PGD phys address into DEST. */
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#define TRAP_LOAD_PGD_PHYS(DEST, TMP) \
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__GET_CPUID(TMP) \
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sethi %hi(trap_block), DEST; \
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sllx TMP, TRAP_BLOCK_SZ_SHIFT, TMP; \
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or DEST, %lo(trap_block), DEST; \
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add DEST, TMP, DEST; \
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ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST;
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/* Clobbers TMP, loads local processor's IRQ work area into DEST. */
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#define TRAP_LOAD_IRQ_WORK(DEST, TMP) \
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__GET_CPUID(TMP) \
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sethi %hi(__irq_work), DEST; \
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sllx TMP, 6, TMP; \
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or DEST, %lo(__irq_work), DEST; \
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add DEST, TMP, DEST;
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/* Clobbers TMP, loads DEST with current thread info pointer. */
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#define TRAP_LOAD_THREAD_REG(DEST, TMP) \
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__GET_CPUID(TMP) \
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sethi %hi(trap_block), DEST; \
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sllx TMP, TRAP_BLOCK_SZ_SHIFT, TMP; \
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or DEST, %lo(trap_block), DEST; \
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ldx [DEST + TMP], DEST;
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/* Given the current thread info pointer in THR, load the per-cpu
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* area base of the current processor into DEST. REG1, REG2, and REG3 are
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* clobbered.
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*
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* You absolutely cannot use DEST as a temporary in this code. The
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* reason is that traps can happen during execution, and return from
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* trap will load the fully resolved DEST per-cpu base. This can corrupt
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* the calculations done by the macro mid-stream.
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*/
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#define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3) \
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ldub [THR + TI_CPU], REG1; \
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sethi %hi(__per_cpu_shift), REG3; \
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sethi %hi(__per_cpu_base), REG2; \
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ldx [REG3 + %lo(__per_cpu_shift)], REG3; \
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ldx [REG2 + %lo(__per_cpu_base)], REG2; \
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sllx REG1, REG3, REG3; \
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add REG3, REG2, DEST;
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#else
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/* Uniprocessor versions, we know the cpuid is zero. */
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#define TRAP_LOAD_PGD_PHYS(DEST, TMP) \
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sethi %hi(trap_block), DEST; \
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or DEST, %lo(trap_block), DEST; \
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ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST;
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#define TRAP_LOAD_IRQ_WORK(DEST, TMP) \
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sethi %hi(__irq_work), DEST; \
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or DEST, %lo(__irq_work), DEST;
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#define TRAP_LOAD_THREAD_REG(DEST, TMP) \
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sethi %hi(trap_block), DEST; \
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ldx [DEST + %lo(trap_block)], DEST;
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/* No per-cpu areas on uniprocessor, so no need to load DEST. */
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#define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3)
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#endif /* !(CONFIG_SMP) */
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#endif /* _SPARC64_CPUDATA_H */
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