diff options
Diffstat (limited to 'cpukit/score/cpu/m32r/context_switch.S')
| -rw-r--r-- | cpukit/score/cpu/m32r/context_switch.S | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/cpukit/score/cpu/m32r/context_switch.S b/cpukit/score/cpu/m32r/context_switch.S new file mode 100644 index 0000000000..dd95a461fb --- /dev/null +++ b/cpukit/score/cpu/m32r/context_switch.S @@ -0,0 +1,69 @@ +/* + * Context switch for the Reneas M32C + * + * COPYRIGHT (c) 1989-2008. + * On-Line Applications Research Corporation (OAR). + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.com/license/LICENSE. + * + * $Id$ + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#define ARG_EXECUTING 8 +#define ARG_HEIR 12 + +#define CONTEXT_R8 0x00 +#define CONTEXT_R9 0x04 +#define CONTEXT_R10 0x08 +#define CONTEXT_R11 0x0C +#define CONTEXT_R12 0x10 +#define CONTEXT_R13_FP 0x14 +#define CONTEXT_R14_LR 0x18 +#define CONTEXT_R15_SP 0x1C +#define CONTEXT_ACC_LOW 0x20 +#define CONTEXT_ACC_HIGH 0x24 + + .file "context_switch.S" + .text + .global _CPU_Context_switch + .type _CPU_Context_switch, @function +_CPU_Context_switch: + st r8, @(CONTEXT_R8,r0) + st r9, @(CONTEXT_R9,r0) + st r10, @(CONTEXT_R10,r0) + st r11, @(CONTEXT_R11,r0) + st r12, @(CONTEXT_R12,r0) + st r13, @(CONTEXT_R13_FP,r0) + st r14, @(CONTEXT_R14_LR,r0) + st r15, @(CONTEXT_R15_SP,r0) + mvfaclo r2 + st r2, @(CONTEXT_ACC_LOW,r0) + mvfachi r2 + st r2, @(CONTEXT_ACC_HIGH,r0) + +restore: + ld r8, @(CONTEXT_R8,r1) + ld r9, @(CONTEXT_R9,r1) + ld r10, @(CONTEXT_R10,r1) + ld r11, @(CONTEXT_R11,r1) + ld r12, @(CONTEXT_R12,r1) + ld r13, @(CONTEXT_R13_FP,r1) + ld r14, @(CONTEXT_R14_LR,r1) + ld r15, @(CONTEXT_R15_SP,r1) + ld r2, @(CONTEXT_ACC_LOW,r1) + mvtaclo r2 + ld r2, @(CONTEXT_ACC_HIGH,r1) + mvtachi r2 + jmp lr + + .global _CPU_Context_Restart_self + .type _CPU_Context_Restart_self, @function +_CPU_Context_Restart_self: + mv r1, r0 + bra restore |