diff options
| author | Philippe Mathieu-Daudé <philmd@linaro.org> | 2022-12-11 19:08:50 +0100 |
|---|---|---|
| committer | Philippe Mathieu-Daudé <philmd@linaro.org> | 2023-01-13 09:32:32 +0100 |
| commit | 9f911a25277aceaad14dc1ce4ac330ad5b057d70 (patch) | |
| tree | 9bd1b33a618324b1746165cf10d84bb2b0db4e3c /hw/mips | |
| parent | 3265f41fc7d988276c672e4bdc46ae60713f141c (diff) | |
hw/mips/malta: Use bootloader generator API for nanoMIPS CPUs (5/5)
Part 5/5: Convert jumping to kernel
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20221211204533.85359-11-philmd@linaro.org>
Diffstat (limited to 'hw/mips')
| -rw-r--r-- | hw/mips/malta.c | 68 |
1 files changed, 11 insertions, 57 deletions
diff --git a/hw/mips/malta.c b/hw/mips/malta.c index e618513e35..b66dad0510 100644 --- a/hw/mips/malta.c +++ b/hw/mips/malta.c @@ -625,11 +625,6 @@ static void write_bootloader_nanomips(uint8_t *base, uint64_t run_addr, /* Small bootloader */ p = (uint16_t *)base; -#define NM_HI1(VAL) (((VAL) >> 16) & 0x1f) -#define NM_HI2(VAL) \ - (((VAL) & 0xf000) | (((VAL) >> 19) & 0xffc) | (((VAL) >> 31) & 0x1)) -#define NM_LO(VAL) ((VAL) & 0xfff) - stw_p(p++, 0x2800); stw_p(p++, 0x001c); /* bc to_here */ stw_p(p++, 0x8000); stw_p(p++, 0xc000); @@ -648,46 +643,6 @@ static void write_bootloader_nanomips(uint8_t *base, uint64_t run_addr, /* nop */ /* to_here: */ - if (semihosting_get_argc()) { - /* Preserve a0 content as arguments have been passed */ - stw_p(p++, 0x8000); stw_p(p++, 0xc000); - /* nop */ - } else { - stw_p(p++, 0x0080); stw_p(p++, 0x0002); - /* li a0,2 */ - } - - stw_p(p++, 0xe3a0 | NM_HI1(ENVP_VADDR - 64)); - - stw_p(p++, NM_HI2(ENVP_VADDR - 64)); - /* lui sp,%hi(ENVP_VADDR - 64) */ - - stw_p(p++, 0x83bd); stw_p(p++, NM_LO(ENVP_VADDR - 64)); - /* ori sp,sp,%lo(ENVP_VADDR - 64) */ - - stw_p(p++, 0xe0a0 | NM_HI1(ENVP_VADDR)); - - stw_p(p++, NM_HI2(ENVP_VADDR)); - /* lui a1,%hi(ENVP_VADDR) */ - - stw_p(p++, 0x80a5); stw_p(p++, NM_LO(ENVP_VADDR)); - /* ori a1,a1,%lo(ENVP_VADDR) */ - - stw_p(p++, 0xe0c0 | NM_HI1(ENVP_VADDR + 8)); - - stw_p(p++, NM_HI2(ENVP_VADDR + 8)); - /* lui a2,%hi(ENVP_VADDR + 8) */ - - stw_p(p++, 0x80c6); stw_p(p++, NM_LO(ENVP_VADDR + 8)); - /* ori a2,a2,%lo(ENVP_VADDR + 8) */ - - stw_p(p++, 0xe0e0 | NM_HI1(loaderparams.ram_low_size)); - - stw_p(p++, NM_HI2(loaderparams.ram_low_size)); - /* lui a3,%hi(loaderparams.ram_low_size) */ - - stw_p(p++, 0x80e7); stw_p(p++, NM_LO(loaderparams.ram_low_size)); - /* ori a3,a3,%lo(loaderparams.ram_low_size) */ #if TARGET_BIG_ENDIAN #define cpu_to_gt32 cpu_to_le32 @@ -725,20 +680,19 @@ static void write_bootloader_nanomips(uint8_t *base, uint64_t run_addr, cpu_mips_phys_to_kseg1(NULL, 0x1be00000 + 0x88), cpu_to_gt32(0x0bc00000 << 3)); - p = v; - #undef cpu_to_gt32 - stw_p(p++, 0xe320 | NM_HI1(kernel_entry)); - - stw_p(p++, NM_HI2(kernel_entry)); - /* lui t9,%hi(kernel_entry) */ - - stw_p(p++, 0x8339); stw_p(p++, NM_LO(kernel_entry)); - /* ori t9,t9,%lo(kernel_entry) */ - - stw_p(p++, 0x4bf9); stw_p(p++, 0x0000); - /* jalrc t8 */ + bl_gen_jump_kernel(&v, + true, ENVP_VADDR - 64, + /* + * If semihosting is used, arguments have already been + * passed, so we preserve $a0. + */ + !semihosting_get_argc(), 2, + true, ENVP_VADDR, + true, ENVP_VADDR + 8, + true, loaderparams.ram_low_size, + kernel_entry); } /* |