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mips_malta: Fix semihosting argument passing for nanoMIPS bare metal

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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>
This commit is contained in:
Stefan Markovic 2018-08-10 19:21:07 +02:00 committed by Aleksandar Markovic
parent 28861af8e9
commit bf4667d05a
1 changed files with 7 additions and 1 deletions
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8
hw/mips/mips_malta.c
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@ -630,8 +630,14 @@ static void write_bootloader_nanomips(uint8_t *base, int64_t run_addr,
/* nop */ /* nop */
/* to_here: */ /* 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 */ /* li a0,2 */
}
stw_p(p++, 0xe3a0 | NM_HI1(ENVP_ADDR - 64)); stw_p(p++, 0xe3a0 | NM_HI1(ENVP_ADDR - 64));