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| author | Dave Chapman <dave@dchapman.com> | 2009-07-16 00:57:02 +0000 |
|---|---|---|
| committer | Dave Chapman <dave@dchapman.com> | 2009-07-16 00:57:02 +0000 |
| commit | 0270e4c59133c910902c6825a224476965a02134 (patch) | |
| tree | 640a4d45e8ba8f150a4962bbba71cecc87c394b3 /firmware | |
| parent | c30d509f34c80fa59cd3120cda4f4383cbcde485 (diff) | |
| download | rockbox-0270e4c59133c910902c6825a224476965a02134.tar.gz rockbox-0270e4c59133c910902c6825a224476965a02134.zip | |
Get the Nano2G bootloader running - it now runs and displays a logo on one type of Nano2G LCD.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21900 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware')
| -rw-r--r-- | firmware/target/arm/s5l8700/crt0.S | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/firmware/target/arm/s5l8700/crt0.S b/firmware/target/arm/s5l8700/crt0.S index 0dcc203844..c79897606c 100644 --- a/firmware/target/arm/s5l8700/crt0.S +++ b/firmware/target/arm/s5l8700/crt0.S @@ -45,10 +45,12 @@ _newstart: newstart2: msr cpsr_c, #0xd3 /* enter supervisor mode, disable IRQ/FIQ */ +#ifdef ROCKBOX_BIG_ENDIAN mov r1, #0x80 mrc 15, 0, r0, c1, c0, 0 orr r0, r0, r1 mcr 15, 0, r0, c1, c0, 0 // set bigendian +#endif ldr r1, =0x3c800000 // disable watchdog mov r0, #0xa5 @@ -66,7 +68,7 @@ newstart2: str r0, [r1] // clear pending interrupts ldr r1, =0x39c0001c str r0, [r1] // clear pending external interrupts - + // ldr r1, =0x3cf00000 // ldr r0, [r1] // mvn r2, #0x30 @@ -80,6 +82,7 @@ newstart2: // orr r0, r0, r2 // str r0, [r1] // switch backlight on +#if CONFIG_CPU==S5L8700 ldr r1, =0x3c500000 // CLKCON ldr r0, =0x00800080 str r0, [r1] @@ -232,6 +235,7 @@ newstart2: ldrhi r1, [r4], #4 strhi r1, [r2], #4 bhi 1b +#endif /* Initialise bss section to zero */ ldr r2, =_edata @@ -241,7 +245,8 @@ newstart2: cmp r3, r2 strhi r4, [r2], #4 bhi 1b - + +#if CONFIG_CPU==S5L8700 /* Copy icode and data to ram */ ldr r2, =_datastart ldr r3, =_dataend @@ -251,6 +256,7 @@ newstart2: ldrhi r1, [r4], #4 strhi r1, [r2], #4 bhi 1b +#endif /* Set up some stack and munge it with 0xdeadbeef */ ldr sp, =_stackend @@ -260,7 +266,7 @@ newstart2: cmp sp, r2 strhi r3, [r2], #4 bhi 1b - + /* Set up stack for IRQ mode */ msr cpsr_c, #0xd2 ldr sp, =_irqstackend @@ -281,6 +287,7 @@ newstart2: // if we did not switch remap on, device // would crash when MENU is pressed, // as that button is connected to BOOT_MODE pin +#if CONFIG_CPU==S5L8700 ldr r1, =0x38200000 ldr r0, [r1] mvn r2, #0x10000 @@ -288,6 +295,7 @@ newstart2: mov r2, #0x1 orr r0, r0, r2 str r0, [r1] // remap iram to address 0x0 +#endif bl main |