Some small cleanups and code for testing

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15312 a1c6a512-1295-4272-9138-f99709370657

bootloader/mrobe500.c

@@ -42,6 +42,7 @@
 #include "uart-target.h"
 #include "tsc2100.h"
 #include "time.h"
+#include "system-arm.h"
 
 #define MRDEBUG
 
@@ -168,6 +169,10 @@ void main(void)
     lcd_init();
     system_init();
     kernel_init();
+    
+    set_irq_level(0);
+    set_fiq_status(FIQ_ENABLED);
+
     adc_init();
     button_init();
     backlight_init();

firmware/export/dm320.h

@@ -24,7 +24,7 @@
 #ifndef __DM320_H__
 #define __DM320_H__
 
-#define LCD_BUFFER_SIZE (640*480*4)
+#define LCD_BUFFER_SIZE (640*480*2)
 #define TTB_SIZE (0x4000)
 /* must be 16Kb (0x4000) aligned */
 #define TTB_BASE   ((unsigned int *)(0x04900000 - TTB_SIZE)) /* End of memory */

firmware/target/arm/crt0.S

@@ -42,7 +42,7 @@ newstart:
     msr    cpsr, #0xd3 /* enter supervisor mode, disable IRQ */
 #endif  
 
-#if !defined(BOOTLOADER) || (CONFIG_CPU == DM320)
+#if !defined(BOOTLOADER)
 #if !defined(DEBUG)
     /* Copy exception handler code to address 0 */
     ldr    r2, =_vectorsstart

firmware/target/arm/tms320dm320/crt0.S

@@ -28,9 +28,22 @@
 
     .global    start
 start:
-    msr    cpsr, #0xd3 /* enter supervisor mode, disable IRQ */
+    .equ    INTC_IRQ0,    0x00030508
+    .equ    INTC_IRQ1,    0x0003050A
+    .equ    INTC_IRQ2,    0x0003050C
+    .equ    INTC_FIQ0,    0x00030500
+    .equ    INTC_FIQ1,    0x00030502
+    .equ    INTC_FIQ2,    0x00030504
+    .equ    INTC_EINT0,   0x00030528
+    .equ    INTC_EINT1,   0x0003052A
+    .equ    INTC_EINT2,   0x0003052C
+    .equ    INTC_FISEL0,  0x00030520
+    .equ    INTC_FISEL1,  0x00030522
+    .equ    INTC_FISEL2,  0x00030524
+    .equ    INTC_MASK,    0xFFFFFFFF
+
+    msr    cpsr, #0xd3 /* enter supervisor mode, disable IRQ/FIQ */
 
-#if !defined(DEBUG)
     /* Copy exception handler code to address 0 */
     ldr    r2, =_vectorsstart
     ldr    r3, =_vectorsend
@@ -40,13 +53,6 @@ start:
     ldrhi  r5, [r4], #4
     strhi  r5, [r2], #4
     bhi    1b
-#else
-    ldr    r1, =vectors
-    ldr    r0, =irq_handler
-    str    r0, [r1, #24]
-    ldr    r0, =fiq_handler
-    str    r0, [r1, #28]
-#endif
 
     /* Disable data and instruction cache, high vectors (at 0xffff0000 instead of 0x00000000) */
 	mrc	p15, 0, r0, c1, c0, 0
@@ -58,9 +64,38 @@ start:
 	orr	r0, r0, #0x00000002
 	mcr	p15, 0, r0, c1, c0, 0
 
-#if !defined(BOOTLOADER)
+#if 0
+	/* mask interrupts */
+	ldr    r1, =INTC_MASK
+    ldr    r2, =INTC_IRQ0
+    strh   r1, [r2]
+    ldr    r2, =INTC_IRQ1
+    strh   r1, [r2]
+    ldr    r2, =INTC_IRQ2
+    strh   r1, [r2]
+    ldr    r2, =INTC_FIQ0
+    strh   r1, [r2]
+    ldr    r2, =INTC_FIQ1
+    strh   r1, [r2]
+    ldr    r2, =INTC_FIQ2
+    strh   r1, [r2]
 
-#if !defined(STUB)
+    mov    r1, #0
+    ldr    r2, =INTC_EINT0
+    strh   r1, [r2]
+    ldr    r2, =INTC_EINT1
+    strh   r1, [r2]
+    ldr    r2, =INTC_EINT2
+    strh   r1, [r2]
+    ldr    r2, =INTC_FISEL0
+    strh   r1, [r2]
+    ldr    r2, =INTC_FISEL1
+    strh   r1, [r2]
+    ldr    r2, =INTC_FISEL2
+    strh   r1, [r2]
+#endif
+
+#if !defined(BOOTLOADER) && !defined(STUB)
     /* Zero out IBSS */
     ldr    r2, =_iedata
     ldr    r3, =_iend
@@ -79,8 +114,7 @@ start:
     ldrhi  r5, [r2], #4
     strhi  r5, [r3], #4
     bhi    1b
-#endif /* !STUB */
+#endif /* !BOOTLOADER,!STUB */
-#endif /* !BOOTLOADER */
 
     /* Initialise bss section to zero */
     ldr    r2, =_edata
@@ -91,27 +125,30 @@ start:
     strhi  r4, [r2], #4
     bhi    1b
 
-    /* Set up some stack and munge it with 0xdeadbeef */
+    /* Load stack munge value */
-    ldr    r3, =stackend
-    ldr    r2, =stackbegin
     ldr    r4, =0xdeadbeef
+
+    /* Set up some stack and munge it with 0xdeadbeef */
+    ldr    r2, =stackbegin
+    ldr    r3, =stackend
 1:
     cmp    r3, r2
     strhi  r4, [r2], #4
     bhi    1b
 
 	 /* Set up stack for IRQ mode */
-    msr    cpsr_c, #0xd2
+    msr    cpsr_c, #0x92 /* IRQ disabled, FIQ enabled */
     ldr    sp, =irq_stack
     /* Set up stack for FIQ mode */
-    msr    cpsr_c, #0xd1
+    msr    cpsr_c, #0xd1 /* IRQ/FIQ disabled */
     ldr    sp, =fiq_stack
 
     /* Let abort and undefined modes use IRQ stack */
-    msr    cpsr_c, #0xd7
+    msr    cpsr_c, #0xd7 /* IRQ/FIQ disabled */
     ldr    sp, =irq_stack
-    msr    cpsr_c, #0xdb
+    msr    cpsr_c, #0xdb /* IRQ/FIQ disabled */
     ldr    sp, =irq_stack
+
     /* Switch to supervisor mode (no IRQ) */
     msr    cpsr_c, #0xd3
     ldr    sp, =stackend
@@ -203,6 +240,9 @@ UIE:
     b UIE
 #endif
 
+/* Align stacks to cache line boundary */
+    .balign 16
+
 /* 256 words of IRQ stack */
     .space 256*4
 irq_stack:

firmware/target/arm/tms320dm320/system-dm320.c

@@ -22,6 +22,7 @@
 #include "system.h"
 #include "panic.h"
 #include "uart-target.h"
+#include "system-arm.h"
 #include "spi.h"
 
 #define default_interrupt(name) \
@@ -143,11 +144,6 @@ void system_reboot(void)
 
 }
 
-void enable_interrupts (void)
-{
-    asm volatile ("msr cpsr_c, #0x13" );
-}
-
 void system_init(void)
 {
     /* taken from linux/arch/arm/mach-itdm320-20/irq.c */
@@ -171,22 +167,24 @@ void system_init(void)
     IO_INTC_FISEL1 = 0;
     IO_INTC_FISEL2 = 0;
 
-    IO_INTC_ENTRY_TBA0 =
+    IO_INTC_ENTRY_TBA0 = 0;
     IO_INTC_ENTRY_TBA1 = 0;
 
     /* set GIO26 (reset pin) to output and low */
     IO_GIO_BITCLR1=(1<<10);
     IO_GIO_DIR1&=~(1<<10);
 
-    enable_interrupts();
     uart_init();
     spi_init();
  
     /* MMU initialization (Starts data and instruction cache) */
     ttb_init();
-    map_section(0, 0, 0x1000, CACHE_NONE); /* Make sure everything is mapped on itself */
+    /* Make sure everything is mapped on itself */
-    map_section(0x00900000, 0x00900000, 64, CACHE_ALL); /* Enable caching for RAM */
+    map_section(0, 0, 0x1000, CACHE_NONE);
-    map_section((int)FRAME, (int)FRAME, 2, BUFFERED); /* enable buffered writing for the framebuffer */
+    /* Enable caching for RAM */
+    map_section(0x00900000, 0x00900000, 64, CACHE_ALL);
+    /* enable buffered writing for the framebuffer */
+    map_section((int)FRAME, (int)FRAME, 1, BUFFERED);
     enable_mmu();
 }