ref: 2e8a4a690e1c5a2cf515432e73cd24ab2a9446a7
dir: /sys/src/9/mtx/raven.c/
/* * ``Nevermore!'' */ #include "u.h" #include "../port/lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "io.h" typedef struct Raven Raven; struct Raven { ushort vid; ushort did; uchar _pad4; uchar rev; uchar _pad6[2]; ushort gcsr; ushort feat; uchar _padC[7]; uchar padj; uchar _pad14[12]; ushort errtst; ushort erren; uchar _pad24[3]; uchar errst; ulong errad; uchar _pad2C[2]; ushort errat; ulong piack; uchar _pad34[12]; struct { ushort start; ushort end; ushort off; uchar _pad; uchar attr; } map[4]; struct { ulong cntl; uchar _pad[3]; uchar stat; } wdt[2]; ulong gpr[4]; }; enum { /* map[] attr bits */ Iom = (1<<0), Mem = (1<<1), Wpen = (1<<4), Wen = (1<<6), Ren = (1<<7), }; static Raven *raven = (Raven*)RAVEN; static ulong mpic; static void setmap(int i, ulong addr, ulong len, ulong busaddr, int attr) { raven->map[i].start = addr>>16; raven->map[i].end = (addr+len-1)>>16; raven->map[i].off = (busaddr-addr)>>16; raven->map[i].attr = attr; } static ulong swap32(ulong x) { return (x>>24)|((x>>8)&0xff00)|((x<<8)&0xff0000)|(x<<24); } static ulong mpic32r(int rno) { return swap32(*(ulong*)(mpic+rno)); } static void mpic32w(int rno, ulong x) { *(ulong*)(mpic+rno) = swap32(x); eieio(); } void raveninit(void) { int i; Pcidev *p; if(raven->vid != 0x1057 || raven->did !=0x4801) panic("raven not found"); /* set up a sensible hardware memory/IO map */ setmap(0, PCIMEM0, PCISIZE0, 0, Wen|Ren|Mem); setmap(1, KZERO, IOSIZE, 0, Wen|Ren); /* keeps PPCbug happy */ setmap(2, PCIMEM1, PCISIZE1, PCISIZE0, Wen|Ren|Mem); setmap(3, IOMEM, IOSIZE, 0, Wen|Ren); /* I/O must be slot 3 for PCI cfg space */ p = pcimatch(nil, 0x1057, 0x4801); if(p == nil) panic("raven PCI regs not found"); mpic = (p->mem[1].bar+PCIMEM0); /* ensure all interrupts are off, and routed to cpu 0 */ for(i = 0; i < 16; i++) { mpic32w(0x10000+0x20*i, (1<<31)); /* mask */ mpic32w(0x10010+0x20*i, 1); /* route to cpu 0 */ } mpic32w(0x20080, 1); /* cpu 0 task pri */ // mpic32w(0x21080, 1); /* cpu 1 task pri */ mpic32w(0x1020, (1<<29)); /* Mixed mode (8259 & Raven intrs both available) */ } void mpicenable(int vec, Vctl *v) { ulong x; x = (1<<22)|(15<<16)|vec; if(vec == 0) x |= (1<<23); mpic32w(0x10000+0x20*vec, x); if(vec != 0) v->eoi = mpiceoi; } void mpicdisable(int vec) { mpic32w(0x10000+0x20*vec, (1<<31)); } int mpicintack(void) { return mpic32r(0x200A0 + (m->machno<<12)); } int mpiceoi(int vec) { USED(vec); mpic32w(0x200B0 + (m->machno<<12), 0); return 0; }