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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2013-06-02 19:05:59 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2013-08-07 08:48:36 +0200 |
| commit | 20e9bc17d4434f85cab228cc9ffa38dc514be63e (patch) | |
| tree | 077c22aca3f2bf07b84a92649a26eb3cb575789f /arch/arm/cpu/lowlevel.S | |
| parent | 72826e747442142a64b865ca6e4a8b3c88acd5d2 (diff) | |
| download | barebox-20e9bc17d4434f85cab228cc9ffa38dc514be63e.tar.gz barebox-20e9bc17d4434f85cab228cc9ffa38dc514be63e.tar.xz | |
ARM: Create an assembly arm_cpu_lowlevel_init function
To avoid the code duplication between the static inline C
function and the assembly macro.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/cpu/lowlevel.S')
| -rw-r--r-- | arch/arm/cpu/lowlevel.S | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/arm/cpu/lowlevel.S b/arch/arm/cpu/lowlevel.S new file mode 100644 index 0000000000..307b447f33 --- /dev/null +++ b/arch/arm/cpu/lowlevel.S @@ -0,0 +1,39 @@ +#include <linux/linkage.h> +#include <init.h> +#include <asm/system.h> + +.section ".text_bare_init_","ax" +ENTRY(arm_cpu_lowlevel_init) + /* set the cpu to SVC32 mode */ + mrs r12, cpsr + bic r12, r12, #0x1f + orr r12, r12, #0xd3 + msr cpsr, r12 + +#if __LINUX_ARM_ARCH__ >= 7 + isb +#elif __LINUX_ARM_ARCH__ == 6 + mcr p15, 0, r12, c7, c5, 4 +#endif + + /* disable MMU stuff and caches */ + mrc p15, 0, r12, c1, c0, 0 + bic r12, r12 , #(CR_M | CR_C | CR_B) + bic r12, r12, #(CR_S | CR_R | CR_V) + orr r12, r12, #CR_I + +#if __LINUX_ARM_ARCH__ >= 6 + orr r12, r12, #CR_U + bic r12, r12, #CR_A +#else + orr r12, r12, #CR_A +#endif + +#ifdef __ARMEB__ + orr r12, r12, #CR_B +#endif + + mcr p15, 0, r12, c1, c0, 0 + + mov pc, lr +ENDPROC(arm_cpu_lowlevel_init) |