notaz.gp2x.de / pcsx_rearmed.git / blame
| Commit | Line | Data |
|---|---|---|
| 3719602c PC |
1 | /* |
| 2 | libco.armeabi (2013-04-05) | |
| 3 | author: Themaister | |
| 4 | license: public domain | |
| 5 | */ | |
| 6 | ||
| 7 | #define LIBCO_C | |
| 8 | #include <libco.h> | |
| 9 | #include <assert.h> | |
| 10 | #include <stdlib.h> | |
| 11 | #include <string.h> | |
| 12 | #include <stdint.h> | |
| 13 | ||
| 14 | #ifndef __APPLE__ | |
| 15 | #include <malloc.h> | |
| 16 | #endif | |
| 17 | ||
| 18 | #ifdef __cplusplus | |
| 19 | extern "C" { | |
| 20 | #endif | |
| 21 | ||
| 22 | static thread_local uint32_t co_active_buffer[64]; | |
| 23 | static thread_local cothread_t co_active_handle; | |
| 24 | ||
| 25 | __asm__ ( | |
| 26 | #if defined(__thumb2__) | |
| 27 | ".align 2\n" | |
| 28 | ".globl co_switch_arm\n" | |
| 29 | ".globl _co_switch_arm\n" | |
| 30 | ".thumb\n" | |
| 31 | ".thumb_func\n" | |
| 32 | ".type co_switch_arm, %function\n" | |
| 33 | ".type _co_switch_arm, %function\n" | |
| 34 | "co_switch_arm:\n" | |
| 35 | "_co_switch_arm:\n" | |
| 36 | " mov r3, sp\n" | |
| 37 | " stmia r1!, {r4, r5, r6, r7, r8, r9, r10, r11}\n" | |
| 38 | " stmia r1!, {r3, lr}\n" | |
| 39 | " ldmia r0!, {r4, r5, r6, r7, r8, r9, r10, r11}\n" | |
| 40 | " ldmfd r0!, { r3 }\n" | |
| 41 | " mov sp, r3\n" | |
| 42 | " ldmfd r0!, { r3 }\n" | |
| 43 | " mov pc, r3\n" | |
| 44 | #else | |
| 45 | ".arm\n" | |
| 46 | ".align 4\n" | |
| 47 | ".globl co_switch_arm\n" | |
| 48 | ".globl _co_switch_arm\n" | |
| 49 | "co_switch_arm:\n" | |
| 50 | "_co_switch_arm:\n" | |
| 51 | " stmia r1!, {r4, r5, r6, r7, r8, r9, r10, r11, sp, lr}\n" | |
| 52 | " ldmia r0!, {r4, r5, r6, r7, r8, r9, r10, r11, sp, pc}\n" | |
| 53 | #endif | |
| 54 | ); | |
| 55 | ||
| 56 | /* ASM */ | |
| 57 | void co_switch_arm(cothread_t handle, cothread_t current); | |
| 58 | ||
| 59 | cothread_t co_create(unsigned int size, void (*entrypoint)(void)) | |
| 60 | { | |
| 61 | uint32_t *ptr = NULL; | |
| 62 | cothread_t handle = 0; | |
| 63 | size = (size + 1023) & ~1023; | |
| 64 | #if defined(__APPLE__) || HAVE_POSIX_MEMALIGN >= 1 | |
| 65 | if (posix_memalign(&handle, 1024, size + 256) < 0) | |
| 66 | return 0; | |
| 67 | #else | |
| 68 | handle = memalign(1024, size + 256); | |
| 69 | #endif | |
| 70 | ||
| 71 | if (!handle) | |
| 72 | return handle; | |
| 73 | ||
| 74 | ptr = (uint32_t*)handle; | |
| 75 | /* Non-volatiles. */ | |
| 76 | ptr[0] = 0; /* r4 */ | |
| 77 | ptr[1] = 0; /* r5 */ | |
| 78 | ptr[2] = 0; /* r6 */ | |
| 79 | ptr[3] = 0; /* r7 */ | |
| 80 | ptr[4] = 0; /* r8 */ | |
| 81 | ptr[5] = 0; /* r9 */ | |
| 82 | ptr[6] = 0; /* r10 */ | |
| 83 | ptr[7] = 0; /* r11 */ | |
| 84 | /* Align stack to 64-bit */ | |
| 85 | ptr[8] = (uintptr_t)ptr + size + 256 - 8; /* r13, stack pointer */ | |
| 86 | ptr[9] = (uintptr_t)entrypoint; /* r15, PC (link register r14 gets saved here). */ | |
| 87 | return handle; | |
| 88 | } | |
| 89 | ||
| 90 | cothread_t co_active(void) | |
| 91 | { | |
| 92 | if (!co_active_handle) | |
| 93 | co_active_handle = co_active_buffer; | |
| 94 | return co_active_handle; | |
| 95 | } | |
| 96 | ||
| 97 | void co_delete(cothread_t handle) | |
| 98 | { | |
| 99 | free(handle); | |
| 100 | } | |
| 101 | ||
| 102 | void co_switch(cothread_t handle) | |
| 103 | { | |
| 104 | cothread_t co_previous_handle = co_active(); | |
| 105 | co_switch_arm(co_active_handle = handle, co_previous_handle); | |
| 106 | } | |
| 107 | ||
| 108 | #ifdef __cplusplus | |
| 109 | } | |
| 110 | #endif |