diff options
Diffstat (limited to 'arch/arm/kernel/fiq.c')
-rw-r--r-- | arch/arm/kernel/fiq.c | 45 |
1 files changed, 2 insertions, 43 deletions
diff --git a/arch/arm/kernel/fiq.c b/arch/arm/kernel/fiq.c index e72dc34eea1c..4c164ece5891 100644 --- a/arch/arm/kernel/fiq.c +++ b/arch/arm/kernel/fiq.c | |||
@@ -89,47 +89,6 @@ void set_fiq_handler(void *start, unsigned int length) | |||
89 | flush_icache_range(0x1c, 0x1c + length); | 89 | flush_icache_range(0x1c, 0x1c + length); |
90 | } | 90 | } |
91 | 91 | ||
92 | /* | ||
93 | * Taking an interrupt in FIQ mode is death, so both these functions | ||
94 | * disable irqs for the duration. Note - these functions are almost | ||
95 | * entirely coded in assembly. | ||
96 | */ | ||
97 | void __naked set_fiq_regs(struct pt_regs *regs) | ||
98 | { | ||
99 | register unsigned long tmp; | ||
100 | asm volatile ( | ||
101 | "mov ip, sp\n\ | ||
102 | stmfd sp!, {fp, ip, lr, pc}\n\ | ||
103 | sub fp, ip, #4\n\ | ||
104 | mrs %0, cpsr\n\ | ||
105 | msr cpsr_c, %2 @ select FIQ mode\n\ | ||
106 | mov r0, r0\n\ | ||
107 | ldmia %1, {r8 - r14}\n\ | ||
108 | msr cpsr_c, %0 @ return to SVC mode\n\ | ||
109 | mov r0, r0\n\ | ||
110 | ldmfd sp, {fp, sp, pc}" | ||
111 | : "=&r" (tmp) | ||
112 | : "r" (®s->ARM_r8), "I" (PSR_I_BIT | PSR_F_BIT | FIQ_MODE)); | ||
113 | } | ||
114 | |||
115 | void __naked get_fiq_regs(struct pt_regs *regs) | ||
116 | { | ||
117 | register unsigned long tmp; | ||
118 | asm volatile ( | ||
119 | "mov ip, sp\n\ | ||
120 | stmfd sp!, {fp, ip, lr, pc}\n\ | ||
121 | sub fp, ip, #4\n\ | ||
122 | mrs %0, cpsr\n\ | ||
123 | msr cpsr_c, %2 @ select FIQ mode\n\ | ||
124 | mov r0, r0\n\ | ||
125 | stmia %1, {r8 - r14}\n\ | ||
126 | msr cpsr_c, %0 @ return to SVC mode\n\ | ||
127 | mov r0, r0\n\ | ||
128 | ldmfd sp, {fp, sp, pc}" | ||
129 | : "=&r" (tmp) | ||
130 | : "r" (®s->ARM_r8), "I" (PSR_I_BIT | PSR_F_BIT | FIQ_MODE)); | ||
131 | } | ||
132 | |||
133 | int claim_fiq(struct fiq_handler *f) | 92 | int claim_fiq(struct fiq_handler *f) |
134 | { | 93 | { |
135 | int ret = 0; | 94 | int ret = 0; |
@@ -174,8 +133,8 @@ void disable_fiq(int fiq) | |||
174 | } | 133 | } |
175 | 134 | ||
176 | EXPORT_SYMBOL(set_fiq_handler); | 135 | EXPORT_SYMBOL(set_fiq_handler); |
177 | EXPORT_SYMBOL(set_fiq_regs); | 136 | EXPORT_SYMBOL(__set_fiq_regs); /* defined in fiqasm.S */ |
178 | EXPORT_SYMBOL(get_fiq_regs); | 137 | EXPORT_SYMBOL(__get_fiq_regs); /* defined in fiqasm.S */ |
179 | EXPORT_SYMBOL(claim_fiq); | 138 | EXPORT_SYMBOL(claim_fiq); |
180 | EXPORT_SYMBOL(release_fiq); | 139 | EXPORT_SYMBOL(release_fiq); |
181 | EXPORT_SYMBOL(enable_fiq); | 140 | EXPORT_SYMBOL(enable_fiq); |