diff options
Diffstat (limited to 'contrib/loaders/flash/numicro_m4/numicro_m4.S')
| -rw-r--r-- | contrib/loaders/flash/numicro_m4/numicro_m4.S | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/contrib/loaders/flash/numicro_m4/numicro_m4.S b/contrib/loaders/flash/numicro_m4/numicro_m4.S new file mode 100644 index 0000000..6c59cca --- /dev/null +++ b/contrib/loaders/flash/numicro_m4/numicro_m4.S @@ -0,0 +1,70 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +/*************************************************************************** + * Copyright (C) 2017 Zale Yu * + * CYYU@nuvoton.com * + * * + * Copyright (C) 2022 Jian-Hong Pan * + * chienhung.pan@gmail.com * + ***************************************************************************/ + + .text + .cpu cortex-m4 + .thumb + + /* Params: + * r0 - workarea buffer / result + * r1 - target address + * r2 - wordcount + * Clobbered: + * r4 - tmp + * r5 - tmp + * r6 - tmp + * r7 - tmp + */ + +.L1: + /* for(register uint32_t i=0;i<wcount;i++){ */ + mov r4, r0 + mov r3, #0 +.L2: + sub r5, r1, r0 + add r7, r4, r5 + cmp r3, r2 + beq .L7 +.L4: + /* NUMICRO_FLASH_ISPADR = faddr; */ + ldr r6, .L8 + str r7, [r6] + /* NUMICRO_FLASH_ISPDAT = *pLW; */ + ldmia r4!, {r7} + ldr r5, .L8+4 + str r7, [r5] + /* faddr += 4; */ + /* pLW++; */ + /* Trigger write action */ + /* NUMICRO_FLASH_ISPTRG = ISPTRG_ISPGO; */ + ldr r5, .L8+8 + mov r6, #1 + str r6, [r5] +.L3: + /* while((NUMICRO_FLASH_ISPTRG & ISPTRG_ISPGO) == ISPTRG_ISPGO){}; */ + ldr r7, [r5] + lsl r7, r7, #31 + bmi .L3 + + add r3, r3, #1 + b .L2 +.L7: + /* return (NUMICRO_FLASH_ISPCON & ISPCON_ISPFF); */ + ldr r3, .L8+12 + ldr r0, [r3] + mov r1, #64 + and r0, r1 +.L9: + bkpt #0 +.L8: + .word 0x4000C004 + .word 0x4000C008 + .word 0x4000C010 + .word 0x4000C000 |