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-rw-r--r--arch/arm/include/asm/processor.h12
-rw-r--r--arch/arm/include/asm/spinlock.h15
-rw-r--r--arch/arm/include/asm/unified.h4
3 files changed, 20 insertions, 11 deletions
diff --git a/arch/arm/include/asm/processor.h b/arch/arm/include/asm/processor.h
index 514a989cbd4b..26164c92fa30 100644
--- a/arch/arm/include/asm/processor.h
+++ b/arch/arm/include/asm/processor.h
@@ -22,6 +22,7 @@
22#include <asm/hw_breakpoint.h> 22#include <asm/hw_breakpoint.h>
23#include <asm/ptrace.h> 23#include <asm/ptrace.h>
24#include <asm/types.h> 24#include <asm/types.h>
25#include <asm/unified.h>
25 26
26#ifdef __KERNEL__ 27#ifdef __KERNEL__
27#define STACK_TOP ((current->personality & ADDR_LIMIT_32BIT) ? \ 28#define STACK_TOP ((current->personality & ADDR_LIMIT_32BIT) ? \
@@ -87,6 +88,17 @@ unsigned long get_wchan(struct task_struct *p);
87#define KSTK_EIP(tsk) task_pt_regs(tsk)->ARM_pc 88#define KSTK_EIP(tsk) task_pt_regs(tsk)->ARM_pc
88#define KSTK_ESP(tsk) task_pt_regs(tsk)->ARM_sp 89#define KSTK_ESP(tsk) task_pt_regs(tsk)->ARM_sp
89 90
91#ifdef CONFIG_SMP
92#define __ALT_SMP_ASM(smp, up) \
93 "9998: " smp "\n" \
94 " .pushsection \".alt.smp.init\", \"a\"\n" \
95 " .long 9998b\n" \
96 " " up "\n" \
97 " .popsection\n"
98#else
99#define __ALT_SMP_ASM(smp, up) up
100#endif
101
90/* 102/*
91 * Prefetching support - only ARMv5. 103 * Prefetching support - only ARMv5.
92 */ 104 */
diff --git a/arch/arm/include/asm/spinlock.h b/arch/arm/include/asm/spinlock.h
index 4f2c28060c9a..e1ce45230913 100644
--- a/arch/arm/include/asm/spinlock.h
+++ b/arch/arm/include/asm/spinlock.h
@@ -11,15 +11,7 @@
11 * sev and wfe are ARMv6K extensions. Uniprocessor ARMv6 may not have the K 11 * sev and wfe are ARMv6K extensions. Uniprocessor ARMv6 may not have the K
12 * extensions, so when running on UP, we have to patch these instructions away. 12 * extensions, so when running on UP, we have to patch these instructions away.
13 */ 13 */
14#define ALT_SMP(smp, up) \
15 "9998: " smp "\n" \
16 " .pushsection \".alt.smp.init\", \"a\"\n" \
17 " .long 9998b\n" \
18 " " up "\n" \
19 " .popsection\n"
20
21#ifdef CONFIG_THUMB2_KERNEL 14#ifdef CONFIG_THUMB2_KERNEL
22#define SEV ALT_SMP("sev.w", "nop.w")
23/* 15/*
24 * For Thumb-2, special care is needed to ensure that the conditional WFE 16 * For Thumb-2, special care is needed to ensure that the conditional WFE
25 * instruction really does assemble to exactly 4 bytes (as required by 17 * instruction really does assemble to exactly 4 bytes (as required by
@@ -31,17 +23,18 @@
31 * the assembler won't change IT instructions which are explicitly present 23 * the assembler won't change IT instructions which are explicitly present
32 * in the input. 24 * in the input.
33 */ 25 */
34#define WFE(cond) ALT_SMP( \ 26#define WFE(cond) __ALT_SMP_ASM( \
35 "it " cond "\n\t" \ 27 "it " cond "\n\t" \
36 "wfe" cond ".n", \ 28 "wfe" cond ".n", \
37 \ 29 \
38 "nop.w" \ 30 "nop.w" \
39) 31)
40#else 32#else
41#define SEV ALT_SMP("sev", "nop") 33#define WFE(cond) __ALT_SMP_ASM("wfe" cond, "nop")
42#define WFE(cond) ALT_SMP("wfe" cond, "nop")
43#endif 34#endif
44 35
36#define SEV __ALT_SMP_ASM(WASM(sev), WASM(nop))
37
45static inline void dsb_sev(void) 38static inline void dsb_sev(void)
46{ 39{
47#if __LINUX_ARM_ARCH__ >= 7 40#if __LINUX_ARM_ARCH__ >= 7
diff --git a/arch/arm/include/asm/unified.h b/arch/arm/include/asm/unified.h
index f5989f46b4d2..b88beaba6b4a 100644
--- a/arch/arm/include/asm/unified.h
+++ b/arch/arm/include/asm/unified.h
@@ -38,6 +38,8 @@
38#ifdef __ASSEMBLY__ 38#ifdef __ASSEMBLY__
39#define W(instr) instr.w 39#define W(instr) instr.w
40#define BSYM(sym) sym + 1 40#define BSYM(sym) sym + 1
41#else
42#define WASM(instr) #instr ".w"
41#endif 43#endif
42 44
43#else /* !CONFIG_THUMB2_KERNEL */ 45#else /* !CONFIG_THUMB2_KERNEL */
@@ -50,6 +52,8 @@
50#ifdef __ASSEMBLY__ 52#ifdef __ASSEMBLY__
51#define W(instr) instr 53#define W(instr) instr
52#define BSYM(sym) sym 54#define BSYM(sym) sym
55#else
56#define WASM(instr) #instr
53#endif 57#endif
54 58
55#endif /* CONFIG_THUMB2_KERNEL */ 59#endif /* CONFIG_THUMB2_KERNEL */