Jean-Philippe Bernardy: gmini support

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5551 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 102 insertions, 1 deletions

diff --git a/firmware/crt0.S b/firmware/crt0.S
index 8d014f0a4c..0abc3bdbc6 100644
--- a/firmware/crt0.S
+++ b/firmware/crt0.S
@@ -21,10 +21,108 @@
 
 //#define BOOTLOADER
         
+#if defined(ARCHOS_GMINI120)
+        .section .text
+        .global _start
+_start:
+        ;; disable all interrupts
+        clrsr fe
+        clrsr ie
+        clrsr te
+
+        ;; copy data section from flash to ram.
+
+        ld a11, #(_datacopy)    ; where the data section is in the flash
+        ld a8, #(_datastart)    ; destination
+
+        ld a9, #_datasize
+        ld r6, e9
+        cmp eq, r6, #0
+        brf .data_copy_loop
+        cmp eq, r9, #0
+        brt .data_copy_end
+.data_copy_loop:        
+        ldc r2, @a11
+        ldw @[a8 + 0], r2
+        add a11, #0x2
+        add a8, #0x2
+        sub r9, #0x2
+        sbc r6, #0
+        cmp ugt, r6, #0
+        brt .data_copy_loop
+        cmp ugt, r9, #0
+        brt .data_copy_loop
+.data_copy_end:
+
+        ld r2, #0
+        ld a8, #(_bssstart)     ; destination
+        ld a9, #_bsssize
+        
+        ld r6, e9
+        cmp eq, r6, #0
+        brf .bss_init_loop
+        cmp eq, r9, #0
+        brt .bss_init_end
+.bss_init_loop: 
+        ldw @[a8 + 0], r2
+        add a8, #0x2
+        sub r9, #0x2
+        sbc r6, #0
+        cmp ugt, r6, #0
+        brt .bss_init_loop
+        cmp ugt, r9, #0
+        brt .bss_init_loop
+.bss_init_end:
+        
+        ld a15, _stackend
+
+        ;; rest of the setup in C
+        jsr _cpu_setup
+
+        ;; enable IRQs (keep traps and fast interrupts low)
+        setsr ie
+
+        ;; go!
+        jsr _main
+        
+        ;; soft reset
+        ld a10, #0
+        ldc r10, @a10
+        jmp a10
+
+        
+        .section .vectors, "ax"
+irq_handler:
+
+        push r0, r1
+        push r2, r3
+        push r4, r5
+        push r6, r7
+        push a8, a9
+        push a10, a11
+        push a12, a13
+        push a14
+        ld a13, #0x3f0000
+        ldb r0, @[a13 + 0x26]
+        add r0, r0
+        ld a10, #_interrupt_vector
+        ldw a13, @[a10 + r0]
+        jsr a13
+        pop a14
+        pop a13, a12
+        pop a11, a10
+        pop a9, a8
+        pop r7, r6
+        pop r5, r4
+        pop r3, r2
+        pop r1, r0
+        ret_irq
+
+#elif defined(IRIVER_H100)
         .section .init.text
         .global start
 start:
-#ifdef IRIVER_H100
+
         /* Platform:     iRiver H1xx */
         move.w #0x2700,%sr
 
@@ -166,6 +264,9 @@ vectors:
         .long _stackend
         .long start
 #else
+        .section .init.text
+        .global start
+start:
         /* Platform:     Archos Jukebox
          * We begin with some tricks. If we have built our code to be loaded
          * via the standalone GDB stub, we will have out VBR at some other