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hw/mips/bootloader: Implement nanoMIPS NOP opcode generator 

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221211204533.85359-3-philmd@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2022-11-02 16:25:46 +01:00
parent cd5066f861
commit cf386ca8ab
1 changed files with 20 additions and 4 deletions
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24
hw/mips/bootloader.c
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@ -54,14 +54,30 @@ static bool bootcpu_supports_isa(uint64_t isa_mask)
return cpu_supports_isa(&MIPS_CPU(first_cpu)->env, isa_mask); return cpu_supports_isa(&MIPS_CPU(first_cpu)->env, isa_mask);
} }
static void st_nm32_p(void **ptr, uint32_t insn)
{
uint16_t *p = *ptr;
stw_p(p, insn >> 16);
p++;
stw_p(p, insn >> 0);
p++;
*ptr = p;
}
/* Base types */ /* Base types */
static void bl_gen_nop(void **ptr) static void bl_gen_nop(void **ptr)
{ {
uint32_t *p = *ptr; if (bootcpu_supports_isa(ISA_NANOMIPS32)) {
st_nm32_p(ptr, 0x8000c000);
} else {
uint32_t *p = *ptr;
stl_p(p, 0); stl_p(p, 0);
p++; p++;
*ptr = p; *ptr = p;
}
} }
static void bl_gen_r_type(void **ptr, uint8_t opcode, static void bl_gen_r_type(void **ptr, uint8_t opcode,