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| author | Tom Rini <trini@konsulko.com> | 2017-01-10 08:19:21 -0500 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2017-01-10 08:19:21 -0500 |
| commit | 0b8404332ed08799ca0630e4cc868df039f206e3 (patch) | |
| tree | c5d4e2c1f963b5716ae9dd7024dce5341feb6856 /arch/arm/cpu/armv8/cpu.c | |
| parent | a705ebc81b7f91bbd0ef7c634284208342901149 (diff) | |
| parent | eb77f5c9f69ef6c8cb39643b7b7107ef7bff5305 (diff) | |
| download | u-boot-imx-0b8404332ed08799ca0630e4cc868df039f206e3.zip u-boot-imx-0b8404332ed08799ca0630e4cc868df039f206e3.tar.gz u-boot-imx-0b8404332ed08799ca0630e4cc868df039f206e3.tar.bz2 | |
Merge branch 'master' of git://git.denx.de/u-boot-sunxi
Diffstat (limited to 'arch/arm/cpu/armv8/cpu.c')
| -rw-r--r-- | arch/arm/cpu/armv8/cpu.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv8/cpu.c b/arch/arm/cpu/armv8/cpu.c index 5dcb5e2..28a27f7 100644 --- a/arch/arm/cpu/armv8/cpu.c +++ b/arch/arm/cpu/armv8/cpu.c @@ -17,6 +17,20 @@ #include <asm/secure.h> #include <linux/compiler.h> +/* + * sdelay() - simple spin loop. + * + * Will delay execution by roughly (@loops * 2) cycles. + * This is necessary to be used before timers are accessible. + * + * A value of "0" will results in 2^64 loops. + */ +void sdelay(unsigned long loops) +{ + __asm__ volatile ("1:\n" "subs %0, %0, #1\n" + "b.ne 1b" : "=r" (loops) : "0"(loops) : "cc"); +} + int cleanup_before_linux(void) { /* |