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[MIPS] Rewrite all the assembler interrupt handlers to C.

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Saves like 1,600 lines of code, is way easier to debug, compilers
frequently do a better job than the cut and paste type of handlers many
boards had.  And finally having all the stuff done in a single place
also means alot of bug potencial for the MT ASE is gone.

The only surviving handler in assembler is the DECstation one; I hope
Maciej will rewrite it.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle
2006-04-03 17:56:36 +01:00
parent d35d473c25
commit e4ac58afdf
100 changed files with 1113 additions and 3387 deletions
Download Patch File Download Diff File Expand all files Collapse all files

78
arch/mips/jazz/irq.c
View File

@@ -15,8 +15,6 @@
#include <asm/io.h>
#include <asm/jazz.h>
extern asmlinkage void jazz_handle_int(void);
static DEFINE_SPINLOCK(r4030_lock);
static void enable_r4030_irq(unsigned int irq)
@@ -90,10 +88,82 @@ void __init init_r4030_ints(void)
*/
void __init arch_init_irq(void)
{
set_except_vector(0, jazz_handle_int);
init_i8259_irqs(); /* Integrated i8259 */
init_r4030_ints();
change_c0_status(ST0_IM, IE_IRQ4 | IE_IRQ3 | IE_IRQ2 | IE_IRQ1);
}
static void loc_call(unsigned int irq, struct pt_regs *regs, unsigned int mask)
{
r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
r4030_read_reg16(JAZZ_IO_IRQ_ENABLE) & mask);
do_IRQ(irq, regs);
r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
r4030_read_reg16(JAZZ_IO_IRQ_ENABLE) | mask);
}
static void ll_local_dev(struct pt_regs *regs)
{
switch (r4030_read_reg32(JAZZ_IO_IRQ_SOURCE)) {
case 0:
panic("Unimplemented loc_no_irq handler");
break;
case 4:
loc_call(JAZZ_PARALLEL_IRQ, regs, JAZZ_IE_PARALLEL);
break;
case 8:
loc_call(JAZZ_PARALLEL_IRQ, regs, JAZZ_IE_FLOPPY);
break;
case 12:
panic("Unimplemented loc_sound handler");
break;
case 16:
panic("Unimplemented loc_video handler");
break;
case 20:
loc_call(JAZZ_ETHERNET_IRQ, regs, JAZZ_IE_ETHERNET);
break;
case 24:
loc_call(JAZZ_SCSI_IRQ, regs, JAZZ_IE_SCSI);
break;
case 28:
loc_call(JAZZ_KEYBOARD_IRQ, regs, JAZZ_IE_KEYBOARD);
break;
case 32:
loc_call(JAZZ_MOUSE_IRQ, regs, JAZZ_IE_MOUSE);
break;
case 36:
loc_call(JAZZ_SERIAL1_IRQ, regs, JAZZ_IE_SERIAL1);
break;
case 40:
loc_call(JAZZ_SERIAL2_IRQ, regs, JAZZ_IE_SERIAL2);
break;
}
}
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
if (pending & IE_IRQ5)
write_c0_compare(0);
else if (pending & IE_IRQ4) {
r4030_read_reg32(JAZZ_TIMER_REGISTER);
do_IRQ(JAZZ_TIMER_IRQ, regs);
} else if (pending & IE_IRQ3)
panic("Unimplemented ISA NMI handler");
else if (pending & IE_IRQ2)
do_IRQ(r4030_read_reg32(JAZZ_EISA_IRQ_ACK), regs);
else if (pending & IE_IRQ1) {
ll_local_dev(regs);
} else if (unlikely(pending & IE_IRQ0))
panic("Unimplemented local_dma handler");
else if (pending & IE_SW1) {
clear_c0_cause(IE_SW1);
panic("Unimplemented sw1 handler");
} else if (pending & IE_SW0) {
clear_c0_cause(IE_SW0);
panic("Unimplemented sw0 handler");
}
}