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| author | Stefan Markovic <smarkovic@wavecomp.com> | 2018-08-10 19:21:07 +0200 |
|---|---|---|
| committer | Aleksandar Markovic <amarkovic@wavecomp.com> | 2018-08-24 17:51:59 +0200 |
| commit | bf4667d05a1386df2dffcbf1eb652f79d25b4cb2 (patch) | |
| tree | f05bfdc9ccc2d1abdea4383a563a56fae54e6bad | |
| parent | 28861af8e94ada07b073d8775e11cc44cae5f4e5 (diff) | |
| download | focaccia-qemu-bf4667d05a1386df2dffcbf1eb652f79d25b4cb2.tar.gz focaccia-qemu-bf4667d05a1386df2dffcbf1eb652f79d25b4cb2.zip | |
mips_malta: Fix semihosting argument passing for nanoMIPS bare metal
Fix passing argument for nanoMIPS bare metal related to the semihosting regime. Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Signed-off-by: Yongbok Kim <yongbok.kim@mips.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com> Signed-off-by: Stefan Markovic <smarkovic@wavecomp.com>
| -rw-r--r-- | hw/mips/mips_malta.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/hw/mips/mips_malta.c b/hw/mips/mips_malta.c index f261dd6a94..40041d5ec0 100644 --- a/hw/mips/mips_malta.c +++ b/hw/mips/mips_malta.c @@ -630,8 +630,14 @@ static void write_bootloader_nanomips(uint8_t *base, int64_t run_addr, /* nop */ /* to_here: */ - stw_p(p++, 0x0080); stw_p(p++, 0x0002); + 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_ADDR - 64)); |