diff options
Diffstat (limited to 'firmware')
| -rw-r--r-- | firmware/link/AT91SAM7S128-ROM-sam7dfu-dfu.ld | 13 | ||||
| -rw-r--r-- | firmware/link/AT91SAM7S256-ROM-sam7dfu-dfu.ld | 6 | ||||
| -rw-r--r-- | firmware/src/start/Cstartup.S | 33 |
3 files changed, 40 insertions, 12 deletions
diff --git a/firmware/link/AT91SAM7S128-ROM-sam7dfu-dfu.ld b/firmware/link/AT91SAM7S128-ROM-sam7dfu-dfu.ld index 23c981b..f71249d 100644 --- a/firmware/link/AT91SAM7S128-ROM-sam7dfu-dfu.ld +++ b/firmware/link/AT91SAM7S128-ROM-sam7dfu-dfu.ld @@ -26,12 +26,17 @@ SECTIONS PROVIDE (etext = .); .data.shared (0x00200020): AT (LOADADDR(.text) + SIZEOF(.text)) { + _data_shared = . ; * (.data.shared) . = ALIGN(4); } >DATA + _edata_shared = . ; + PROVIDE (edata_shared = .); + /* 0x00200000 ... */ - .data (0x00200000 + SIZEOF(.text)): AT ( LOADADDR(.text) + SIZEOF(.text) + SIZEOF(.data.shared)) { + .data (0x00200000 + SIZEOF(.text)): AT + ( LOADADDR(.text) + SIZEOF(.text) + SIZEOF(.data.shared)) { _data = . ; * (.vectram) * (.data) @@ -41,9 +46,9 @@ SECTIONS _edata = . ; PROVIDE (edata = .); - /* dfu.functab addresses are valid as long as DFU is in flash, i.e. only while - * application calls those functions. Once executing in DFU mode, we are - * re-located to ram */ + /* dfu.functab addresses are valid as long as DFU is in flash, i.e. + * only while application calls those functions. Once executing in + * DFU mode, we are re-located to ram */ .dfu.functab 0x00000fd0: AT ( ADDR(.dfu.functab) - ADDR(.text) ) { *(.dfu.functab) . = ALIGN(4096); diff --git a/firmware/link/AT91SAM7S256-ROM-sam7dfu-dfu.ld b/firmware/link/AT91SAM7S256-ROM-sam7dfu-dfu.ld index b81d44c..0fa1a06 100644 --- a/firmware/link/AT91SAM7S256-ROM-sam7dfu-dfu.ld +++ b/firmware/link/AT91SAM7S256-ROM-sam7dfu-dfu.ld @@ -26,10 +26,14 @@ SECTIONS PROVIDE (etext = .); .data.shared (0x00200020): AT (LOADADDR(.text) + SIZEOF(.text)) { + _data_shared = . ; * (.data.shared) . = ALIGN(4); } >DATA + _edata_shared = . ; + PROVIDE (edata_shared = .); + /* 0x00200000 ... */ .data (0x00200000 + SIZEOF(.text)): AT ( LOADADDR(.text) + SIZEOF(.text) + SIZEOF(.data.shared)) { _data = . ; @@ -44,7 +48,7 @@ SECTIONS /* dfu.functab addresses are valid as long as DFU is in flash, i.e. only while * application calls those functions. Once executing in DFU mode, we are * re-located to ram */ - .dfu.functab 0x00000fd0: AT ( ADDR(.dfu.functab) - ADDR(.text) ) { + .dfu.functab 0x00010fd0: AT ( ADDR(.dfu.functab) - ADDR(.text) ) { *(.dfu.functab) . = ALIGN(4096); } >FLASH diff --git a/firmware/src/start/Cstartup.S b/firmware/src/start/Cstartup.S index 5ed2712..f1c341e 100644 --- a/firmware/src/start/Cstartup.S +++ b/firmware/src/start/Cstartup.S @@ -312,15 +312,16 @@ InitReset: msr CPSR_c, #ARM_MODE_SVC mov r13, r0 /* Init stack Sup */ -# Relocate DFU .data section (Copy from ROM to RAM) +# Relocate DFU .data.shared section (Copy from ROM to RAM) LDR R1, =_etext - LDR R2, =_data - LDR R3, =_edata -LoopRel: CMP R2, R3 + LDR R2, =_data_shared + LDR R3, =_edata_shared +LoopRelDS: CMP R2, R3 LDRLO R0, [R1], #4 STRLO R0, [R2], #4 - BLO LoopRel + BLO LoopRelDS +/* # Clear DFU .bss section (Zero init) MOV R0, #0 LDR R1, =__bss_start__ @@ -328,6 +329,7 @@ LoopRel: CMP R2, R3 LoopZI: CMP R1, R2 STRLO R0, [R1], #4 BLO LoopZI +*/ /* prepare c function call to main */ mov r0, #0 /* argc = 0 */ @@ -343,13 +345,30 @@ LoopZI: CMP R1, R2 ldr r1, =AT91C_BASE_PIOA ldr r2, [r1, #PIOA_PDSR] tst r2, #PIO_BOOTLDR - bne _reloc_dfu_text + bne _reloc_dfu #endif bx r10 -_reloc_dfu_text: +_reloc_dfu: + /* Relocate DFU .data section (Copy from ROM to RAM) */ + LDR R1, =_edata_shared + LDR R2, =_data + LDR R3, =_edata +LoopRel: CMP R2, R3 + LDRLO R0, [R1], #4 + STRLO R0, [R2], #4 + BLO LoopRel + + /* Clear DFU .bss section (Zero init) */ + MOV R0, #0 + LDR R1, =__bss_start__ + LDR R2, =__bss_end__ +LoopZI: CMP R1, R2 + STRLO R0, [R1], #4 + BLO LoopZI + /* relocate DFU .text into RAM */ ldr r1, =0x00100000 ldr r2, =0x00200000 ldr r3, =_etext |