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| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2016-08-10 16:08:39 +0900 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2016-08-11 17:49:13 +0900 |
| commit | 0efbbc5c613b28614eb3323145b5d3eda4a33188 (patch) | |
| tree | 93597a28d5a2520bafd79455725630a427fd06da | |
| parent | e731a5385d1e8b0ffaa69977899dc4246de53db4 (diff) | |
| download | u-boot-imx-0efbbc5c613b28614eb3323145b5d3eda4a33188.zip u-boot-imx-0efbbc5c613b28614eb3323145b5d3eda4a33188.tar.gz u-boot-imx-0efbbc5c613b28614eb3323145b5d3eda4a33188.tar.bz2 | |
ARM: uniphier: refactor L2 zero-touching code in lowlevel_init
Here, the ldr pseudo-instruction falls into the ldr + data set.
The register access by [r1, #offset] produces shorter code.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| -rw-r--r-- | arch/arm/mach-uniphier/arm32/lowlevel_init.S | 48 |
1 files changed, 22 insertions, 26 deletions
diff --git a/arch/arm/mach-uniphier/arm32/lowlevel_init.S b/arch/arm/mach-uniphier/arm32/lowlevel_init.S index 8e32b35..2be9505 100644 --- a/arch/arm/mach-uniphier/arm32/lowlevel_init.S +++ b/arch/arm/mach-uniphier/arm32/lowlevel_init.S @@ -11,8 +11,6 @@ #include <linux/sizes.h> #include <asm/system.h> -#include "ssc-regs.h" - ENTRY(lowlevel_init) mov r8, lr @ persevere link reg across call @@ -88,39 +86,37 @@ ENDPROC(enable_mmu) */ #define BOOT_RAM_SIZE (SZ_32K) #define BOOT_RAM_BASE ((CONFIG_SPL_STACK) - (BOOT_RAM_SIZE)) -#define BOOT_WAY_BITS (0x00000100) /* way 8 */ +#define BOOT_RAM_WAYS (0x00000100) @ way 8 + +#define SSCO_BASE 0x506c0000 +#define SSCOPE 0x244 +#define SSCOQM 0x248 +#define SSCOQAD 0x24c +#define SSCOQSZ 0x250 +#define SSCOQWN 0x258 +#define SSCOPPQSEF 0x25c +#define SSCOLPQS 0x260 ENTRY(setup_init_ram) - /* - * Touch to zero for the boot way - */ -0: - /* - * set UNIPHIER_SSCOQM, UNIPHIER_SSCOQAD, UNIPHIER_SSCOQSZ, UNIPHIER_SSCOQWN in this order - */ - ldr r0, = 0x00408006 @ touch to zero with address range - ldr r1, = UNIPHIER_SSCOQM - str r0, [r1] + ldr r1, = SSCO_BASE + + /* Touch to zero for the boot way */ +0: ldr r0, = 0x00408006 @ touch to zero with address range + str r0, [r1, #SSCOQM] ldr r0, = BOOT_RAM_BASE - ldr r1, = UNIPHIER_SSCOQAD - str r0, [r1] + str r0, [r1, #SSCOQAD] ldr r0, = BOOT_RAM_SIZE - ldr r1, = UNIPHIER_SSCOQSZ - str r0, [r1] - ldr r0, = BOOT_WAY_BITS - ldr r1, = UNIPHIER_SSCOQWN - str r0, [r1] - ldr r1, = UNIPHIER_SSCOPPQSEF - ldr r0, [r1] + str r0, [r1, #SSCOQSZ] + ldr r0, = BOOT_RAM_WAYS + str r0, [r1, #SSCOQWN] + ldr r0, [r1, #SSCOPPQSEF] cmp r0, #0 @ check if the command is successfully set bne 0b @ try again if an error occurs - ldr r1, = UNIPHIER_SSCOLPQS -1: - ldr r0, [r1] +1: ldr r0, [r1, #SSCOLPQS] cmp r0, #0x4 bne 1b @ wait until the operation is completed - str r0, [r1] @ clear the complete notification flag + str r0, [r1, #SSCOLPQS] @ clear the complete notification flag mov pc, lr ENDPROC(setup_init_ram) |