-// SH2 internal peripherals
-static u32 sh2_peripheral_read8(u32 a, int id)
-{
- u8 *r = (void *)Pico32xMem->sh2_peri_regs[id];
- u32 d;
-
- a &= 0x1ff;
- d = r[a];
- if (a == 4)
- d = 0x84; // SCI SSR
-
- elprintf(EL_32X, "%csh2 peri r8 [%08x] %02x @%06x", id ? 's' : 'm', a | ~0x1ff, d, sh2_pc(id));
- return d;
-}
-
-static u32 sh2_peripheral_read32(u32 a, int id)
-{
- u32 d;
- a &= 0x1fc;
- d = Pico32xMem->sh2_peri_regs[id][a / 4];
-
- elprintf(EL_32X, "%csh2 peri r32 [%08x] %08x @%06x", id ? 's' : 'm', a | ~0x1ff, d, sh2_pc(id));
- return d;
-}
-
-static void sh2_peripheral_write8(u32 a, u32 d, int id)
-{
- u8 *r = (void *)Pico32xMem->sh2_peri_regs[id];
- elprintf(EL_32X, "%csh2 peri w8 [%08x] %02x @%06x", id ? 's' : 'm', a, d, sh2_pc(id));
-
- a &= 0x1ff;
- r[a] = d;
-}
-
-static void sh2_peripheral_write32(u32 a, u32 d, int id)
-{
- u32 *r = Pico32xMem->sh2_peri_regs[id];
- elprintf(EL_32X, "%csh2 peri w32 [%08x] %08x @%06x", id ? 's' : 'm', a, d, sh2_pc(id));
-
- a &= 0x1fc;
- r[a / 4] = d;
-
- switch (a) {
- // division unit (TODO: verify):
- case 0x104: // DVDNT: divident L, starts divide
- elprintf(EL_32X, "%csh2 divide %08x / %08x", id ? 's' : 'm', d, r[0x100 / 4]);
- if (r[0x100 / 4]) {
- signed int divisor = r[0x100 / 4];
- r[0x118 / 4] = r[0x110 / 4] = (signed int)d % divisor;
- r[0x104 / 4] = r[0x11c / 4] = r[0x114 / 4] = (signed int)d / divisor;
- }
- break;
- case 0x114:
- elprintf(EL_32X, "%csh2 divide %08x%08x / %08x @%08x",
- id ? 's' : 'm', r[0x110 / 4], d, r[0x100 / 4], sh2_pc(id));
- if (r[0x100 / 4]) {
- signed long long divident = (signed long long)r[0x110 / 4] << 32 | d;
- signed int divisor = r[0x100 / 4];
- // XXX: undocumented mirroring to 0x118,0x11c?
- r[0x118 / 4] = r[0x110 / 4] = divident % divisor;
- r[0x11c / 4] = r[0x114 / 4] = divident / divisor;
- }
- break;
- }
-
- if ((a == 0x1b0 || a == 0x18c) && (dmac0->chcr0 & 3) == 1 && (dmac0->dmaor & 1)) {
- elprintf(EL_32X, "sh2 DMA %08x -> %08x, cnt %d, chcr %04x @%06x",
- dmac0->sar0, dmac0->dar0, dmac0->tcr0, dmac0->chcr0, sh2_pc(id));
- dmac0->tcr0 &= 0xffffff;
-
- // HACK: assume bus is busy and SH2 is halted
- // XXX: use different mechanism for this, not poll det
- Pico32x.emu_flags |= id ? P32XF_SSH2POLL : P32XF_MSH2POLL;
- ash2_end_run(5);