Jean-Philippe Bernardy: gmini support

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

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