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Use FIQ register + comments.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17297 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Maurus Cuelenaere 2008-05-01 15:37:22 +00:00
parent 59efebff1e
commit a1fa57fc01
1 changed files with 7 additions and 7 deletions
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14
firmware/target/arm/tms320dm320/system-dm320.c
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@ -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;