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authorMaurus Cuelenaere <mcuelenaere@gmail.com>2008-05-01 15:37:22 +0000
committerMaurus Cuelenaere <mcuelenaere@gmail.com>2008-05-01 15:37:22 +0000
commita1fa57fc01232c027e01417180989f36e76367bf (patch)
treeed4937790e8b8118f7f892958bde75648ffd760f /firmware
parent59efebff1e3352a1d28b633a6206d3120c8b1936 (diff)
downloadrockbox-a1fa57fc01232c027e01417180989f36e76367bf.tar.gz
rockbox-a1fa57fc01232c027e01417180989f36e76367bf.zip
Use FIQ register + comments.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17297 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware')
-rw-r--r--firmware/target/arm/tms320dm320/system-dm320.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/firmware/target/arm/tms320dm320/system-dm320.c b/firmware/target/arm/tms320dm320/system-dm320.c
index c03e05522c..7180d3b421 100644
--- a/firmware/target/arm/tms320dm320/system-dm320.c
+++ b/firmware/target/arm/tms320dm320/system-dm320.c
@@ -122,7 +122,7 @@ void irq_handler(void)
}
asm volatile( "add sp, sp, #8 \n" /* Cleanup stack */
"ldmfd sp!, {r0-r7, ip, lr} \n" /* Restore context */
- "subs pc, lr, #4 \n"); /* Return from FIQ */
+ "subs pc, lr, #4 \n"); /* Return from IRQ */
}
void fiq_handler(void)
@@ -135,12 +135,12 @@ void fiq_handler(void)
"sub lr, lr, #4 \r\n"
"stmfd sp!, {r0-r3, ip, lr} \r\n"
"mov r0, #0x00030000 \r\n"
- "ldr r0, [r0, #0x518] \r\n"
- "sub r0, r0, #1 \r\n"
+ "ldr r0, [r0, #0x510] \r\n" /* Fetch value from IO_INTC_FIQENTRY0 */
+ "sub r0, r0, #1 \r\n"
"ldr r1, =irqvector \r\n"
- "ldr r1, [r1, r0, lsl #2] \r\n"
- "blx r1 \r\n"
- "ldmfd sp!, {r0-r3, ip, pc}^ \r\n"
+ "ldr r1, [r1, r0, lsl #2] \r\n" /* Divide value by 4 (TBA0/TBA1 is set to 0) and load appropriate pointer from the vector list */
+ "blx r1 \r\n" /* Jump to handler */
+ "ldmfd sp!, {r0-r3, ip, pc}^ \r\n" /* Return from FIQ */
);
}
@@ -197,7 +197,7 @@ void system_init(void)
unsigned short i;
/* Reset interrupt priorities to default values */
for(i = 0; i < 23; i++)
- DM320_REG(0x0540+i*2) = ( (i*2+1) << 8 ) | i*2 ;//IO_INTC_PRIORITYx
+ DM320_REG(0x0540+i*2) = ( (i*2+1) << 8 ) | i*2 ;/* IO_INTC_PRIORITYx */
/* Turn off all timers */
IO_TIMER0_TMMD = CONFIG_TIMER0_TMMD_STOP;