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* Add magic VU1_CIA register.

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This commit is contained in:
Ian Carmichael 1998-02-16 22:07:11 +00:00
parent 9c577d9a94
commit 04a7f72aea
2 changed files with 27 additions and 10 deletions
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30
sim/mips/sky-vu1.c
View file

@ -15,6 +15,8 @@
VectorUnitState vu1_state;
#define sim_warning printf
static char vu1_umem_buffer[VU1_MEM0_SIZE] __attribute__ ((aligned(16)));
static char vu1_mem_buffer[VU1_MEM1_SIZE] __attribute__ ((aligned(16)));
@ -69,6 +71,8 @@ vu1_io_read_register_window(device *me,
*(u_long*)&source_buffer[VPE1_STAT - VU1_REGISTER_WINDOW_START] = stat;
}
*(u_long*)&source_buffer[VU1_CIA - VU1_REGISTER_WINDOW_START] = vu1_state.junk._vpepc;
#if 0
printf("%s: Read: %x, %d, dest: %x, space: %d, %x!\n", me->name, (int)addr, nr_bytes, (int)dest, space, *(int*)&(vu1_state.regs.VPE_STAT));
printf(" vu1_state.regs.VPE_STAT = %x\n", *(int*)&(vu1_state.regs.VPE_STAT));
@ -95,19 +99,27 @@ vu1_io_write_register_window(device *me,
{
char *dest;
if (addr == VPE1_STAT && nr_bytes == 4) {
/* Magic to switch VU to run state, until other methods are available. */
assert(nr_bytes == 4);
if (addr == VPE1_STAT) {
/* Do nothing, read only register. */
sim_warning("vu1: Write to read/only register at address %lx.\n", (u_long)addr);
return nr_bytes;
} else if (addr == VU1_MST) {
/* Magic switch to set _TOP register */
vu1_state.junk._TOP = T2H_4(*(int*)source);
return nr_bytes;
} else if (addr == VU1_CIA) {
vu1_state.junk._vpepc = T2H_4(*(int*)source);
vu1_state.runState = VU_RUN;
vu1_state.junk.eflag = 0;
vu1_state.junk.peflag = 0;
/*printf("Magic start run...\n");*/
return nr_bytes;
} else if (addr == VU1_MST && nr_bytes == 4) {
/* Magic switch to set _TOP register */
/*printf("Magic set TOP register to %d\n", T2H_4(*(int*)source));*/
vu1_state.junk._TOP = T2H_4(*(int*)source);
return nr_bytes;
}
}
/* Everything else does nothing... */
sim_warning("vu1: Write to unimplemented control register at address %lx.\n", (u_long)addr);
return nr_bytes;
/*printf("%s: Write: %x, %d, source: %x, space: %d!\n", me->name, (int)addr, nr_bytes, (int)source, space);*/

7
sim/mips/sky-vu1.h
View file

@ -37,7 +37,12 @@ int vu1_status(void);
#define VU1_MTPC 0x110073a0
#define VPE1_STAT 0x110073d0
#define VU1_REGISTER_WINDOW_END 0x110073e0
#define VPU_STAT 0x110073d0
#define VU1_CIA 0x110073e0
#define VU1_REGISTER_WINDOW_END 0x110073f0
#define VU1_REGISTER_WINDOW_SIZE (VU1_REGISTER_WINDOW_END - VU1_REGISTER_WINDOW_START)