[Rpcemu] PATCH: Implement OS_Reset "0x0ff"

changeset: 1150:e1de572e7804
branch: trunk
user: rrt@sc3d.org
date: Mon Sep 10 23:23:00 2018 +0100
summary: Add support for powering off

diff -r f224afc8c4d6 -r e1de572e7804 src/arm_common.c
--- a/src/arm_common.c Mon Sep 10 23:22:01 2018 +0100
+++ b/src/arm_common.c Mon Sep 10 23:23:00 2018 +0100
@@ -38,6 +38,8 @@
#define SWI_OS_Byte 0x6
#define SWI_OS_Word 0x7
#define SWI_OS_Mouse 0x1c
+#define SWI_OS_ReadSysInfo 0x58
+#define SWI_OS_Reset 0x6a
#define SWI_OS_CallASWI 0x6f
#define SWI_OS_CallASWIR12 0x71

@@ -372,6 +374,21 @@
}
}

+ /* Intercept OS_Reset to check for turning off
+ https://www.riscosopen.org/wiki/documentation/show/OS_Reset
+ */
+ if (swinum == SWI_OS_Reset) {
+ if (arm.reg[0] == 0x46464F26) { /* 0x0ff */
+ exit(0);
+ }
+ }
+
+ if (swinum == SWI_OS_ReadSysInfo && arm.reg[0] == 8) {
+ arm.reg[0] = 0; /* Unknown hardware platform */
+ arm.reg[1] = 0x08; /* Software control over PSU supported */
+ return;
+ }
+
/* Intercept RISC OS Portable SWIs to enable RPCEmu to sleep when
RISC OS is idle */
if (config.cpu_idle) {

Attached, a patch to implement powering off (intercept OS_Reset with R0="0x0ff", and to advertise this capability (intercept OS_ReadSysInfo 8).

Do let me know if there's anything I can do to make it more digestible. As it is, it just patches opSWI in arm_common.c.

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https://rrt.sc3d.org