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-rw-r--r--arch/arm64/kernel/psci.c37
1 files changed, 3 insertions, 34 deletions
diff --git a/arch/arm64/kernel/psci.c b/arch/arm64/kernel/psci.c
index 3425f311c49e..9b8a70ae64a1 100644
--- a/arch/arm64/kernel/psci.c
+++ b/arch/arm64/kernel/psci.c
@@ -57,6 +57,9 @@ static struct psci_operations psci_ops;
57static int (*invoke_psci_fn)(u64, u64, u64, u64); 57static int (*invoke_psci_fn)(u64, u64, u64, u64);
58typedef int (*psci_initcall_t)(const struct device_node *); 58typedef int (*psci_initcall_t)(const struct device_node *);
59 59
60asmlinkage int __invoke_psci_fn_hvc(u64, u64, u64, u64);
61asmlinkage int __invoke_psci_fn_smc(u64, u64, u64, u64);
62
60enum psci_function { 63enum psci_function {
61 PSCI_FN_CPU_SUSPEND, 64 PSCI_FN_CPU_SUSPEND,
62 PSCI_FN_CPU_ON, 65 PSCI_FN_CPU_ON,
@@ -109,40 +112,6 @@ static void psci_power_state_unpack(u32 power_state,
109 PSCI_0_2_POWER_STATE_AFFL_SHIFT; 112 PSCI_0_2_POWER_STATE_AFFL_SHIFT;
110} 113}
111 114
112/*
113 * The following two functions are invoked via the invoke_psci_fn pointer
114 * and will not be inlined, allowing us to piggyback on the AAPCS.
115 */
116static noinline int __invoke_psci_fn_hvc(u64 function_id, u64 arg0, u64 arg1,
117 u64 arg2)
118{
119 asm volatile(
120 __asmeq("%0", "x0")
121 __asmeq("%1", "x1")
122 __asmeq("%2", "x2")
123 __asmeq("%3", "x3")
124 "hvc #0\n"
125 : "+r" (function_id)
126 : "r" (arg0), "r" (arg1), "r" (arg2));
127
128 return function_id;
129}
130
131static noinline int __invoke_psci_fn_smc(u64 function_id, u64 arg0, u64 arg1,
132 u64 arg2)
133{
134 asm volatile(
135 __asmeq("%0", "x0")
136 __asmeq("%1", "x1")
137 __asmeq("%2", "x2")
138 __asmeq("%3", "x3")
139 "smc #0\n"
140 : "+r" (function_id)
141 : "r" (arg0), "r" (arg1), "r" (arg2));
142
143 return function_id;
144}
145
146static int psci_get_version(void) 115static int psci_get_version(void)
147{ 116{
148 int err; 117 int err;