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hw/mips/bootloader: Allow bl_gen_jump_kernel to optionally set register

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When one of the $sp/$a[0..3] register is already set, we might
want bl_gen_jump_kernel() to NOT set it again. Pass a boolean
argument for each register, to allow to optionally set them.

Tested-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221026191821.28167-2-philmd@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2022-10-26 21:18:19 +02:00
parent 3c43fc333b
commit 36d7487b2a
4 changed files with 37 additions and 12 deletions
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28
hw/mips/bootloader.c
View file

@ -165,15 +165,29 @@ void bl_gen_jump_to(uint32_t **p, target_ulong jump_addr)
bl_gen_nop(p); /* delay slot */
}
void bl_gen_jump_kernel(uint32_t **p, target_ulong sp, target_ulong a0,
target_ulong a1, target_ulong a2, target_ulong a3,
void bl_gen_jump_kernel(uint32_t **p,
bool set_sp, target_ulong sp,
bool set_a0, target_ulong a0,
bool set_a1, target_ulong a1,
bool set_a2, target_ulong a2,
bool set_a3, target_ulong a3,
target_ulong kernel_addr)
{
bl_gen_load_ulong(p, BL_REG_SP, sp);
bl_gen_load_ulong(p, BL_REG_A0, a0);
bl_gen_load_ulong(p, BL_REG_A1, a1);
bl_gen_load_ulong(p, BL_REG_A2, a2);
bl_gen_load_ulong(p, BL_REG_A3, a3);
if (set_sp) {
bl_gen_load_ulong(p, BL_REG_SP, sp);
}
if (set_a0) {
bl_gen_load_ulong(p, BL_REG_A0, a0);
}
if (set_a1) {
bl_gen_load_ulong(p, BL_REG_A1, a1);
}
if (set_a2) {
bl_gen_load_ulong(p, BL_REG_A2, a2);
}
if (set_a3) {
bl_gen_load_ulong(p, BL_REG_A3, a3);
}
bl_gen_jump_to(p, kernel_addr);
}