SummerCart64/sw/controller/src/loader.S
Mateusz Faderewski ff69030643
[SC64][FW][HW][SW] New version based on LCMXO2 FPGA (#19)
* isv support + usb/dd improvements

* make room for saves

* update offset

* fixed debug address

* idk

* exception

* ironed out all broken stuff

* cleanup

* return epc fix

* better

* more cleanup

* even more cleanup

* mooore cleanup

* fixed printf

* no assert

* improved docker build, pyft232 instead of pyserial

* fixed displaying long message strings

description test

* just straight cleanup

* smallest cleanup

* PAL

* cpu buffer

* n64 bootloader done

* super slow usb storage reading implemented

* reduced buffer size

* usb gets fast

* little cleanup

* double buffered reads

* removed separate event id

* ISV in hardware finally

* small exception changes

* mac testing

* py spacing

* fsd write, rtc, isv and reset fixes

* fixxx

* good stopping point

* usb fixed?

* pretend we have 128 MB sdram

* backup

* chmod

* test

* test done

* more tests

* user rm

* help

* final fix

* updated component values

* nice asset names

* cic 64dd support

* ddipl enable separation

* pre DMA rewrite, created dedicated buffer memory space, simplified code

* dma rewrite, needs testing

* moved xml

* dd basics

* timing

* 64dd working yet again, isv brought back, dma fixes, usb path rewrite, pc code rewrite

* added usb read functionality, general cleanup

* changed mem addressing

* added fpga flash update access

* added mcu update

* chmod

* little cleanup

* update format and stuff

* fixes

* uninitialized fix

* small fixes

* update fixes

* update stuff done

* fpga update tested

* build time fix

* boot fix

* test timing

* readme test

* test 2

* reports

* testseet

* final

* build test

* forgot

* button and naming

* General cleanup

And multiline commit message test

* Exception screen UI touch ups

* display separation and tests beginning

* pc software update

* pc software done

* timing test

* delete launch.json

* sw fixes

* fixed button hole diameter in shell

* small cleanup, rpi testing

* shell fillet fix, pc rtc printing

* added cfg lock mechanism

* moved lock to cfg address space

* extended ROM and ISV fixes

* preliminary sd card support

* little sd card cleanup

* sd menu fixes

* 5 second limit

* reduced shell thickness

* basic led act blinking

* faster sd menu loading

* inst cache invalidate

* sd card writing is working

* SD card CSD and CID registers

* wait for previous command

* led error codes

* fixed cfg_translate_address use

* 64dd from sd card working

* 64dd speedup and button handling

* delayed address latching cycle - might break other builds, needs testing

* bootloader improvements

* small fixes

* return previous cfg when setting new

* cache stuff

* unfloader debug protocol support

* UNFLoader style debug command line support

* requirements.txt

* shell groove fillet

* reset state inside controller

* fixed fast PI read, added PI R/W fifo debug info

* PI access prioritize

* SD clock stop when RX FIFO is more than half full

* flash erase method change

* CFG error handling, TLOZ MM debug ISV support

* CIC5167 support

* general fixes

* USB unplugged cable handling

* turn off led when changing between error/act modes

* rtc 2 bit clock stop support

* line endings

* Revert "line endings"

This reverts commit d0ddfe5ec7.

* PI address debug

* readme test

* diagram update

* diagram background

* diagram background

* diagram background

* updated readme
2022-11-10 11:46:54 +01:00

100 lines
1.6 KiB
ArmAsm

.syntax unified
.cpu cortex-m0plus
.fpu softvfp
.thumb
.section .text.Reset_Handler
.type Reset_Handler, %function
Reset_Handler:
.global Reset_Handler
cpsid i
init_text:
ldr r0, =_stext
ldr r1, =_etext
ldr r2, =_sitext
bl copy_section
init_rodata:
ldr r0, =_srodata
ldr r1, =_erodata
ldr r2, =_sirodata
bl copy_section
init_data:
ldr r0, =_sdata
ldr r1, =_edata
ldr r2, =_sidata
bl copy_section
init_bss:
ldr r2, =_sbss
ldr r4, =_ebss
movs r3, #0
b 2f
1:
str r3, [r2]
adds r2, r2, #4
2:
cmp r2, r4
bcc 1b
run:
bl loader
boot:
ldr r0, =_app_magic
ldr r0, [r0]
ldr r1, =0x34364353
cmp r0, r1
bne empty_image
ldr r0, =_app_header
push {r0}
bl set_vector_table_offset
pop {r0}
ldr r1, [r0, #0]
msr MSP, r1
ldr r1, [r0, #4]
blx r1
empty_image:
bl no_valid_image
loop:
b loop
copy_section:
movs r3, #0
b 2f
1:
ldr r4, [r2, r3]
str r4, [r0, r3]
adds r3, r3, #4
2:
adds r4, r0, r3
cmp r4, r1
bcc 1b
bx lr
.section .text.Default_Handler, "ax", %progbits
Default_Handler:
.global Default_Handler
b Default_Handler
.section .isr_vector, "a", %progbits
.type g_pfnVectors, %object
g_pfnVectors:
.global g_pfnVectors
.word _estack
.word Reset_Handler
.word NMI_Handler
.word HardFault_Handler
.weak NMI_Handler
.thumb_set NMI_Handler, Default_Handler
.weak HardFault_Handler
.thumb_set HardFault_Handler, Default_Handler