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i8259 PIC support 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1486 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-07-02 18:11:03 +00:00
parent bf82d81801
commit 73133662c6
1 changed files with 7 additions and 62 deletions
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69
hw/mips_r4k.c
View File

@ -1,79 +1,23 @@
#include "vl.h"
#define DEBUG_IRQ_COUNT
#define BIOS_FILENAME "mips_bios.bin"
//#define BIOS_FILENAME "system.bin"
#define KERNEL_LOAD_ADDR 0x80010000
#define INITRD_LOAD_ADDR 0x80800000
/* MIPS R4K IRQ controler */
#if defined(DEBUG_IRQ_COUNT)
static uint64_t irq_count[16];
#endif
extern FILE *logfile;
void mips_set_irq (int n_IRQ, int level)
static void pic_irq_request(void *opaque, int level)
{
uint32_t mask;
if (n_IRQ < 0 || n_IRQ >= 8)
return;
mask = 0x100 << n_IRQ;
if (level != 0) {
#if 1
if (logfile) {
fprintf(logfile, "%s n %d l %d mask %08x %08x\n",
__func__, n_IRQ, level, mask, cpu_single_env->CP0_Status);
}
#endif
cpu_single_env->CP0_Cause |= mask;
if ((cpu_single_env->CP0_Status & 0x00000001) &&
(cpu_single_env->CP0_Status & mask)) {
#if defined(DEBUG_IRQ_COUNT)
irq_count[n_IRQ]++;
#endif
#if 1
if (logfile)
fprintf(logfile, "%s raise IRQ\n", __func__);
#endif
cpu_interrupt(cpu_single_env, CPU_INTERRUPT_HARD);
}
if (level) {
cpu_single_env->CP0_Cause |= 0x00000400;
cpu_interrupt(cpu_single_env, CPU_INTERRUPT_HARD);
} else {
cpu_single_env->CP0_Cause &= ~mask;
cpu_single_env->CP0_Cause &= ~0x00000400;
cpu_reset_interrupt(cpu_single_env, CPU_INTERRUPT_HARD);
}
}
void pic_set_irq (int n_IRQ, int level)
{
mips_set_irq(n_IRQ + 2, level);
}
void pic_info (void)
{
term_printf("IRQ asserted: %02x mask: %02x\n",
(cpu_single_env->CP0_Cause >> 8) & 0xFF,
(cpu_single_env->CP0_Status >> 8) & 0xFF);
}
void irq_info (void)
{
#if !defined(DEBUG_IRQ_COUNT)
term_printf("irq statistic code not compiled.\n");
#else
int i;
int64_t count;
term_printf("IRQ statistics:\n");
for (i = 0; i < 8; i++) {
count = irq_count[i];
if (count > 0)
term_printf("%2d: %lld\n", i, count);
}
#endif
}
void cpu_mips_irqctrl_init (void)
{
}
@ -295,6 +239,7 @@ void mips_r4k_init (int ram_size, int vga_ram_size, int boot_device,
cpu_register_physical_memory(0x14000000, 0x00010000, io_memory);
isa_mem_base = 0x10000000;
isa_pic = pic_init(pic_irq_request, cpu_single_env);
serial_init(0x3f8, 4, serial_hds[0]);
vga_initialize(NULL, ds, phys_ram_base + ram_size, ram_size,
vga_ram_size);