path: root/target-mips/helper.h
diff options
authorLeon Alrae <leon.alrae@imgtec.com>2015-06-19 11:08:43 +0100
committerLeon Alrae <leon.alrae@imgtec.com>2015-06-26 09:08:50 +0100
commit3b3c1694cfd394b73de426edebdbf90c28f664fd (patch)
treedcd93bdb3b5bc6a41bf4d9c518cca24925d10b94 /target-mips/helper.h
parentff334767728011218c62f7476232d260cb5b28e6 (diff)
target-mips: add Unified Hosting Interface (UHI) support
Add UHI semihosting support for MIPS. QEMU run with "-semihosting" option will alter the behaviour of SDBBP 1 instruction -- UHI operation will be called instead of generating a debug exception. Also tweak Malta's pseudo-bootloader. On CPU reset the $4 register is set to -1 if semihosting arguments are passed to indicate that the UHI operations should be used to obtain input arguments. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'target-mips/helper.h')
1 files changed, 2 insertions, 0 deletions
diff --git a/target-mips/helper.h b/target-mips/helper.h
index 8df98c71b8..2b28e875cf 100644
--- a/target-mips/helper.h
+++ b/target-mips/helper.h
@@ -1,6 +1,8 @@
DEF_HELPER_3(raise_exception_err, noreturn, env, i32, int)
DEF_HELPER_2(raise_exception, noreturn, env, i32)
+DEF_HELPER_1(do_semihosting, void, env)
#ifdef TARGET_MIPS64
DEF_HELPER_4(sdl, void, env, tl, tl, int)
DEF_HELPER_4(sdr, void, env, tl, tl, int)