Implement MIPS specific setup of the gd_t structure to support pre-relocation malloc. If CONFIG_SYS_MALLOC_F_LEN is specified, a memory area will be reserved after the initial stack area and the gd->malloc_base pointer will be initialized.
After this patch the new driver model can be used on MIPS.
Signed-off-by: Daniel Schwierzeck daniel.schwierzeck@gmail.com
---
arch/mips/cpu/mips32/start.S | 24 +++++++++++++++++++++++- arch/mips/cpu/mips64/start.S | 24 +++++++++++++++++++++++- arch/mips/include/asm/config.h | 2 -- 3 files changed, 46 insertions(+), 4 deletions(-)
diff --git a/arch/mips/cpu/mips32/start.S b/arch/mips/cpu/mips32/start.S index 5946859..36b92cc 100644 --- a/arch/mips/cpu/mips32/start.S +++ b/arch/mips/cpu/mips32/start.S @@ -140,9 +140,31 @@ reset: #endif
/* Set up temporary stack */ - li sp, CONFIG_SYS_INIT_SP_ADDR + li t0, -16 + li t1, CONFIG_SYS_INIT_SP_ADDR + and sp, t1, t0 # force 16 byte alignment + sub sp, sp, GD_SIZE # reserve space for gd + and sp, sp, t0 # force 16 byte alignment + move k0, sp # save gd pointer +#ifdef CONFIG_SYS_MALLOC_F_LEN + li t2, CONFIG_SYS_MALLOC_F_LEN + sub sp, sp, t2 # reserve space for early malloc + and sp, sp, t0 # force 16 byte alignment +#endif move fp, sp
+ /* Clear gd */ + move t0, k0 +1: + sw zero, 0(t0) + blt t0, t1, 1b + addi t0, 4 + +#ifdef CONFIG_SYS_MALLOC_F_LEN + addu t0, k0, GD_MALLOC_BASE # gd->malloc_base offset + sw sp, 0(t0) +#endif + la t9, board_init_f jr t9 move ra, zero diff --git a/arch/mips/cpu/mips64/start.S b/arch/mips/cpu/mips64/start.S index 81df923..471bc1e 100644 --- a/arch/mips/cpu/mips64/start.S +++ b/arch/mips/cpu/mips64/start.S @@ -134,9 +134,31 @@ reset: #endif
/* Set up temporary stack */ - dli sp, CONFIG_SYS_INIT_SP_ADDR + dli t0, -16 + dli t1, CONFIG_SYS_INIT_SP_ADDR + and sp, t1, t0 # force 16 byte alignment + dsub sp, sp, GD_SIZE # reserve space for gd + and sp, sp, t0 # force 16 byte alignment + move k0, sp # save gd pointer +#ifdef CONFIG_SYS_MALLOC_F_LEN + dli t2, CONFIG_SYS_MALLOC_F_LEN + dsub sp, sp, t2 # reserve space for early malloc + and sp, sp, t0 # force 16 byte alignment +#endif move fp, sp
+ /* Clear gd */ + move t0, k0 +1: + sw zero, 0(t0) + blt t0, t1, 1b + daddi t0, 4 + +#ifdef CONFIG_SYS_MALLOC_F_LEN + daddu t0, k0, GD_MALLOC_BASE # gd->malloc_base offset + sw sp, 0(t0) +#endif + dla t9, board_init_f jr t9 move ra, zero diff --git a/arch/mips/include/asm/config.h b/arch/mips/include/asm/config.h index 1c8a42b..3a891ba 100644 --- a/arch/mips/include/asm/config.h +++ b/arch/mips/include/asm/config.h @@ -7,8 +7,6 @@ #ifndef _ASM_CONFIG_H_ #define _ASM_CONFIG_H_
-#define CONFIG_SYS_GENERIC_GLOBAL_DATA - #define CONFIG_LMB #define CONFIG_SYS_BOOT_RAMDISK_HIGH