diff options
Diffstat (limited to 'contrib/loaders/trampoline/espressif/xtensa/esp_xtensa_stub_tramp_win.S')
| -rw-r--r-- | contrib/loaders/trampoline/espressif/xtensa/esp_xtensa_stub_tramp_win.S | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/contrib/loaders/trampoline/espressif/xtensa/esp_xtensa_stub_tramp_win.S b/contrib/loaders/trampoline/espressif/xtensa/esp_xtensa_stub_tramp_win.S new file mode 100644 index 0000000..e0c827d --- /dev/null +++ b/contrib/loaders/trampoline/espressif/xtensa/esp_xtensa_stub_tramp_win.S @@ -0,0 +1,41 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +/*************************************************************************** + * Xtensa flasher stub wrapper * + * Copyright (C) 2017 Espressif Systems Ltd. * + ***************************************************************************/ + +/* + * Expects : + * a0 = zero + * a1 = stack_base + stack_size - 16, 16 bytes aligned + * a8 = address of the function to call + * Params : + * a2 = command arg0, result (out) + * a3 = command arg1 + * a4 = command arg2 + * a5 = command arg3 + * a6 = command arg4 + * Maximum 5 user args + */ + .text + + .align 4 +_stub_enter: + /* initialize initial stack frame for callx8 */ + addi a9, sp, 32 /* point 16 past extra save area */ + s32e a9, sp, -12 /* access to extra save area */ + /* prepare args */ + mov a10, a2 + mov a11, a3 + mov a12, a4 + mov a13, a5 + mov a14, a6 + /* call stub */ + callx8 a8 + /* prepare return value */ + mov a2, a10 + break 0,0 + +_idle_loop: + j _idle_loop |