diff options
| author | Simon Glass <sjg@chromium.org> | 2019-05-02 10:52:27 -0600 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2019-05-08 13:02:18 +0800 |
| commit | 49dffb7a074e9b9d2c27a303798c0e6bc5eea3ba (patch) | |
| tree | d1994197f366cc51e603b967f9c96435eb2af9d7 /arch/x86/cpu | |
| parent | 094ba7bb5be2a015e6227386e4380548515c3868 (diff) | |
x86: Add a way to jump from TPL to SPL
When TPL finishes it needs to jump to SPL with the stack set up correctly.
Add a function to handle this.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'arch/x86/cpu')
| -rw-r--r-- | arch/x86/cpu/start.S | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/cpu/start.S b/arch/x86/cpu/start.S index 30fa7def46..4a82add76b 100644 --- a/arch/x86/cpu/start.S +++ b/arch/x86/cpu/start.S @@ -190,6 +190,19 @@ board_init_f_r_trampoline: /* Re-enter U-Boot by calling board_init_f_r() */ call board_init_f_r +#ifdef CONFIG_TPL +.globl jump_to_spl +.type jump_to_spl, @function +jump_to_spl: + /* Reset stack to the top of CAR space */ + movl $(CONFIG_SYS_CAR_ADDR + CONFIG_SYS_CAR_SIZE - 4), %esp +#ifdef CONFIG_DCACHE_RAM_MRC_VAR_SIZE + subl $CONFIG_DCACHE_RAM_MRC_VAR_SIZE, %esp +#endif + + jmp *%eax +#endif + die: hlt jmp die |