/* Copyright (C) 1998, Cygnus Solutions */ #include "config.h" #include #include "sky-pke.h" #include "sky-dma.h" #include "sim-bits.h" #include "sim-assert.h" #include "sky-vu0.h" #include "sky-vu1.h" #include "sky-gpuif.h" #include "sky-device.h" #ifdef HAVE_STRING_H #include #else #ifdef HAVE_STRINGS_H #include #endif #endif /* Internal function declarations */ static int pke_io_read_buffer(device*, void*, int, address_word, unsigned, sim_cpu*, sim_cia); static int pke_io_write_buffer(device*, const void*, int, address_word, unsigned, sim_cpu*, sim_cia); static void pke_reset(struct pke_device*); static void pke_issue(SIM_DESC, struct pke_device*); static void pke_pc_advance(struct pke_device*, int num_words); static struct fifo_quadword* pke_pcrel_fifo(struct pke_device*, int operand_num, unsigned_4** operand); static unsigned_4* pke_pcrel_operand(struct pke_device*, int operand_num); static unsigned_4 pke_pcrel_operand_bits(struct pke_device*, int bit_offset, int bit_width, unsigned_4* sourceaddr); static void pke_attach(SIM_DESC sd, struct pke_device* me); enum pke_check_target { chk_vu, chk_path1, chk_path2, chk_path3 }; static int pke_check_stall(struct pke_device* me, enum pke_check_target what); static void pke_flip_dbf(struct pke_device* me); static void pke_begin_interrupt_stall(struct pke_device* me); /* PKEcode handlers */ static void pke_code_nop(struct pke_device* me, unsigned_4 pkecode); static void pke_code_stcycl(struct pke_device* me, unsigned_4 pkecode); static void pke_code_offset(struct pke_device* me, unsigned_4 pkecode); static void pke_code_base(struct pke_device* me, unsigned_4 pkecode); static void pke_code_itop(struct pke_device* me, unsigned_4 pkecode); static void pke_code_stmod(struct pke_device* me, unsigned_4 pkecode); static void pke_code_mskpath3(struct pke_device* me, unsigned_4 pkecode); static void pke_code_pkemark(struct pke_device* me, unsigned_4 pkecode); static void pke_code_flushe(struct pke_device* me, unsigned_4 pkecode); static void pke_code_flush(struct pke_device* me, unsigned_4 pkecode); static void pke_code_flusha(struct pke_device* me, unsigned_4 pkecode); static void pke_code_pkemscal(struct pke_device* me, unsigned_4 pkecode); static void pke_code_pkemscnt(struct pke_device* me, unsigned_4 pkecode); static void pke_code_pkemscalf(struct pke_device* me, unsigned_4 pkecode); static void pke_code_stmask(struct pke_device* me, unsigned_4 pkecode); static void pke_code_strow(struct pke_device* me, unsigned_4 pkecode); static void pke_code_stcol(struct pke_device* me, unsigned_4 pkecode); static void pke_code_mpg(struct pke_device* me, unsigned_4 pkecode); static void pke_code_direct(struct pke_device* me, unsigned_4 pkecode); static void pke_code_directhl(struct pke_device* me, unsigned_4 pkecode); static void pke_code_unpack(struct pke_device* me, unsigned_4 pkecode); static void pke_code_error(struct pke_device* me, unsigned_4 pkecode); /* Static data */ struct pke_device pke0_device = { { "pke0", &pke_io_read_buffer, &pke_io_write_buffer }, /* device */ 0, 0, /* ID, flags */ {}, /* regs */ {}, 0, /* FIFO write buffer */ { NULL, 0, 0, 0 }, /* FIFO */ NULL, /* FIFO trace file */ -1, -1, 0, 0, 0, /* invalid FIFO cache */ 0, 0 /* pc */ }; struct pke_device pke1_device = { { "pke1", &pke_io_read_buffer, &pke_io_write_buffer }, /* device */ 1, 0, /* ID, flags */ {}, /* regs */ {}, 0, /* FIFO write buffer */ { NULL, 0, 0, 0 }, /* FIFO */ NULL, /* FIFO trace file */ -1, -1, 0, 0, 0, /* invalid FIFO cache */ 0, 0 /* pc */ }; /* External functions */ /* Attach PKE addresses to main memory */ void pke0_attach(SIM_DESC sd) { pke_attach(sd, & pke0_device); pke_reset(& pke0_device); } void pke1_attach(SIM_DESC sd) { pke_attach(sd, & pke1_device); pke_reset(& pke1_device); } /* Issue a PKE instruction if possible */ void pke0_issue(SIM_DESC sd) { pke_issue(sd, & pke0_device); } void pke1_issue(SIM_DESC sd) { pke_issue(sd, & pke1_device); } /* Internal functions */ /* Attach PKE memory regions to simulator */ void pke_attach(SIM_DESC sd, struct pke_device* me) { /* register file */ sim_core_attach (sd, NULL, 0, access_read_write, 0, (me->pke_number == 0) ? PKE0_REGISTER_WINDOW_START : PKE1_REGISTER_WINDOW_START, PKE_REGISTER_WINDOW_SIZE /*nr_bytes*/, 0 /*modulo*/, (device*) me, NULL /*buffer*/); /* FIFO port */ sim_core_attach (sd, NULL, 0, access_read_write, 0, (me->pke_number == 0) ? PKE0_FIFO_ADDR : PKE1_FIFO_ADDR, sizeof(quadword) /*nr_bytes*/, 0 /*modulo*/, (device*) me, NULL /*buffer*/); /* VU MEM0 tracking table */ sim_core_attach (sd, NULL, 0, access_read_write, 0, ((me->pke_number == 0) ? VU0_MEM0_SRCADDR_START : VU1_MEM0_SRCADDR_START), ((me->pke_number == 0) ? VU0_MEM0_SIZE : VU1_MEM0_SIZE) / 2, 0 /*modulo*/, NULL, NULL /*buffer*/); /* VU MEM1 tracking table */ sim_core_attach (sd, NULL, 0, access_read_write, 0, ((me->pke_number == 0) ? VU0_MEM1_SRCADDR_START : VU1_MEM1_SRCADDR_START), ((me->pke_number == 0) ? VU0_MEM1_SIZE : VU1_MEM1_SIZE) / 4, 0 /*modulo*/, NULL, NULL /*buffer*/); /* attach to trace file if appropriate */ { char trace_envvar[80]; char* trace_filename = NULL; sprintf(trace_envvar, "VIF%d_TRACE_FILE", me->pke_number); trace_filename = getenv(trace_envvar); if(trace_filename != NULL) { me->fifo_trace_file = fopen(trace_filename, "w"); if(me->fifo_trace_file == NULL) perror("VIF FIFO trace error on fopen"); else setvbuf(me->fifo_trace_file, NULL, _IOLBF, 0); } } } /* Handle a PKE read; return no. of bytes read */ int pke_io_read_buffer(device *me_, void *dest, int space, address_word addr, unsigned nr_bytes, sim_cpu *cpu, sim_cia cia) { /* downcast to gather embedding pke_device struct */ struct pke_device* me = (struct pke_device*) me_; /* find my address ranges */ address_word my_reg_start = (me->pke_number == 0) ? PKE0_REGISTER_WINDOW_START : PKE1_REGISTER_WINDOW_START; address_word my_fifo_addr = (me->pke_number == 0) ? PKE0_FIFO_ADDR : PKE1_FIFO_ADDR; /* enforce that an access does not span more than one quadword */ address_word low = ADDR_TRUNC_QW(addr); address_word high = ADDR_TRUNC_QW(addr + nr_bytes - 1); if(low != high) return 0; /* classify address & handle */ if((addr >= my_reg_start) && (addr < my_reg_start + PKE_REGISTER_WINDOW_SIZE)) { /* register bank */ int reg_num = ADDR_TRUNC_QW(addr - my_reg_start) >> 4; int reg_byte = ADDR_OFFSET_QW(addr); /* find byte-offset inside register bank */ int readable = 1; quadword result; /* clear result */ result[0] = result[1] = result[2] = result[3] = 0; /* handle reads to individual registers; clear `readable' on error */ switch(reg_num) { /* handle common case of register reading, side-effect free */ /* PKE1-only registers*/ case PKE_REG_BASE: case PKE_REG_OFST: case PKE_REG_TOPS: case PKE_REG_TOP: case PKE_REG_DBF: if(me->pke_number == 0) readable = 0; /* fall through */ /* PKE0 & PKE1 common registers*/ case PKE_REG_STAT: case PKE_REG_ERR: case PKE_REG_MARK: case PKE_REG_CYCLE: case PKE_REG_MODE: case PKE_REG_NUM: case PKE_REG_MASK: case PKE_REG_CODE: case PKE_REG_ITOPS: case PKE_REG_ITOP: case PKE_REG_R0: case PKE_REG_R1: case PKE_REG_R2: case PKE_REG_R3: case PKE_REG_C0: case PKE_REG_C1: case PKE_REG_C2: case PKE_REG_C3: result[0] = H2T_4(me->regs[reg_num][0]); break; /* handle common case of write-only registers */ case PKE_REG_FBRST: readable = 0; break; default: ASSERT(0); /* test above should prevent this possibility */ } /* perform transfer & return */ if(readable) { /* copy the bits */ memcpy(dest, ((unsigned_1*) &result) + reg_byte, nr_bytes); /* okay */ } else { /* return zero bits */ memset(dest, 0, nr_bytes); } return nr_bytes; /* NOTREACHED */ } else if(addr >= my_fifo_addr && addr < my_fifo_addr + sizeof(quadword)) { /* FIFO */ /* FIFO is not readable: return a word of zeroes */ memset(dest, 0, nr_bytes); return nr_bytes; } /* NOTREACHED */ return 0; } /* Handle a PKE read; return no. of bytes written */ int pke_io_write_buffer(device *me_, const void *src, int space, address_word addr, unsigned nr_bytes, sim_cpu *cpu, sim_cia cia) { /* downcast to gather embedding pke_device struct */ struct pke_device* me = (struct pke_device*) me_; /* find my address ranges */ address_word my_reg_start = (me->pke_number == 0) ? PKE0_REGISTER_WINDOW_START : PKE1_REGISTER_WINDOW_START; address_word my_fifo_addr = (me->pke_number == 0) ? PKE0_FIFO_ADDR : PKE1_FIFO_ADDR; /* enforce that an access does not span more than one quadword */ address_word low = ADDR_TRUNC_QW(addr); address_word high = ADDR_TRUNC_QW(addr + nr_bytes - 1); if(low != high) return 0; /* classify address & handle */ if((addr >= my_reg_start) && (addr < my_reg_start + PKE_REGISTER_WINDOW_SIZE)) { /* register bank */ int reg_num = ADDR_TRUNC_QW(addr - my_reg_start) >> 4; int reg_byte = ADDR_OFFSET_QW(addr); /* find byte-offset inside register bank */ int writeable = 1; quadword input; /* clear input */ input[0] = input[1] = input[2] = input[3] = 0; /* write user-given bytes into input */ memcpy(((unsigned_1*) &input) + reg_byte, src, nr_bytes); /* make words host-endian */ input[0] = T2H_4(input[0]); /* we may ignore other words */ /* handle writes to individual registers; clear `writeable' on error */ switch(reg_num) { case PKE_REG_FBRST: /* Order these tests from least to most overriding, in case multiple bits are set. */ if(BIT_MASK_GET(input[0], PKE_REG_FBRST_STC_B, PKE_REG_FBRST_STC_E)) { /* clear a bunch of status bits */ PKE_REG_MASK_SET(me, STAT, PSS, 0); PKE_REG_MASK_SET(me, STAT, PFS, 0); PKE_REG_MASK_SET(me, STAT, PIS, 0); PKE_REG_MASK_SET(me, STAT, INT, 0); PKE_REG_MASK_SET(me, STAT, ER0, 0); PKE_REG_MASK_SET(me, STAT, ER1, 0); me->flags &= ~PKE_FLAG_PENDING_PSS; /* will allow resumption of possible stalled instruction */ } if(BIT_MASK_GET(input[0], PKE_REG_FBRST_STP_B, PKE_REG_FBRST_STP_E)) { me->flags |= PKE_FLAG_PENDING_PSS; } if(BIT_MASK_GET(input[0], PKE_REG_FBRST_FBK_B, PKE_REG_FBRST_FBK_E)) { PKE_REG_MASK_SET(me, STAT, PFS, 1); } if(BIT_MASK_GET(input[0], PKE_REG_FBRST_RST_B, PKE_REG_FBRST_RST_E)) { pke_reset(me); } break; case PKE_REG_ERR: /* copy bottom three bits */ BIT_MASK_SET(me->regs[PKE_REG_ERR][0], 0, 2, BIT_MASK_GET(input[0], 0, 2)); break; case PKE_REG_MARK: /* copy bottom sixteen bits */ PKE_REG_MASK_SET(me, MARK, MARK, BIT_MASK_GET(input[0], 0, 15)); /* reset MRK bit in STAT */ PKE_REG_MASK_SET(me, STAT, MRK, 0); break; /* handle common case of read-only registers */ /* PKE1-only registers - not really necessary to handle separately */ case PKE_REG_BASE: case PKE_REG_OFST: case PKE_REG_TOPS: case PKE_REG_TOP: case PKE_REG_DBF: if(me->pke_number == 0) writeable = 0; /* fall through */ /* PKE0 & PKE1 common registers*/ case PKE_REG_STAT: /* ignore FDR bit for PKE1_STAT -- simulator does not implement PKE->RAM transfers */ case PKE_REG_CYCLE: case PKE_REG_MODE: case PKE_REG_NUM: case PKE_REG_MASK: case PKE_REG_CODE: case PKE_REG_ITOPS: case PKE_REG_ITOP: case PKE_REG_R0: case PKE_REG_R1: case PKE_REG_R2: case PKE_REG_R3: case PKE_REG_C0: case PKE_REG_C1: case PKE_REG_C2: case PKE_REG_C3: writeable = 0; break; default: ASSERT(0); /* test above should prevent this possibility */ } /* perform return */ if(! writeable) { ; /* error */ } return nr_bytes; /* NOTREACHED */ } else if(addr >= my_fifo_addr && addr < my_fifo_addr + sizeof(quadword)) { /* FIFO */ struct fifo_quadword* fqw; int fifo_byte = ADDR_OFFSET_QW(addr); /* find byte-offset inside fifo quadword */ unsigned_4 dma_tag_present = 0; int i; /* collect potentially-partial quadword in write buffer; LE byte order */ memcpy(((unsigned_1*)& me->fifo_qw_in_progress) + fifo_byte, src, nr_bytes); /* mark bytes written */ for(i = fifo_byte; i < fifo_byte + nr_bytes; i++) BIT_MASK_SET(me->fifo_qw_done, i, i, 1); /* return if quadword not quite written yet */ if(BIT_MASK_GET(me->fifo_qw_done, 0, sizeof(quadword)-1) != BIT_MASK_BTW(0, sizeof(quadword)-1)) return nr_bytes; /* all done - process quadword after clearing flag */ BIT_MASK_SET(me->fifo_qw_done, 0, sizeof(quadword)-1, 0); /* allocate required address in FIFO */ fqw = pke_fifo_fit(& me->fifo); ASSERT(fqw != NULL); /* fill in unclassified FIFO quadword data in host byte order */ fqw->word_class[0] = fqw->word_class[1] = fqw->word_class[2] = fqw->word_class[3] = wc_unknown; fqw->data[0] = T2H_4(me->fifo_qw_in_progress[0]); fqw->data[1] = T2H_4(me->fifo_qw_in_progress[1]); fqw->data[2] = T2H_4(me->fifo_qw_in_progress[2]); fqw->data[3] = T2H_4(me->fifo_qw_in_progress[3]); /* read DMAC-supplied indicators */ ASSERT(sizeof(unsigned_4) == 4); PKE_MEM_READ(me, (me->pke_number == 0 ? DMA_D0_MADR : DMA_D1_MADR), & fqw->source_address, /* converted to host-endian */ 4); PKE_MEM_READ(me, (me->pke_number == 0 ? DMA_D0_PKTFLAG : DMA_D1_PKTFLAG), & dma_tag_present, 4); if(dma_tag_present) { /* lower two words are DMA tags */ fqw->word_class[0] = fqw->word_class[1] = wc_dma; } /* set FQC to "1" as FIFO is now not empty */ PKE_REG_MASK_SET(me, STAT, FQC, 1); /* okay */ return nr_bytes; } /* NOTREACHED */ return 0; } /* Reset the PKE */ void pke_reset(struct pke_device* me) { /* advance PC over last quadword in FIFO; keep previous FIFO history */ me->fifo_pc = pke_fifo_flush(& me->fifo); me->qw_pc = 0; /* clear registers, flag, other state */ memset(me->regs, 0, sizeof(me->regs)); me->fifo_qw_done = 0; me->flags = 0; } /* Issue & swallow next PKE opcode if possible/available */ void pke_issue(SIM_DESC sd, struct pke_device* me) { struct fifo_quadword* fqw; unsigned_4 fw; unsigned_4 cmd, intr; /* 1 -- fetch PKE instruction */ /* confirm availability of new quadword of PKE instructions */ fqw = pke_fifo_access(& me->fifo, me->fifo_pc); if(fqw == NULL) return; /* skip over DMA tag, if present */ pke_pc_advance(me, 0); /* note: this can only change qw_pc from 0 to 2 and will not invalidate fqw */ /* "fetch" instruction quadword and word */ fw = fqw->data[me->qw_pc]; /* store word in PKECODE register */ me->regs[PKE_REG_CODE][0] = fw; /* 2 -- test go / no-go for PKE execution */ /* switch on STAT:PSS if PSS-pending and in idle state */ if((PKE_REG_MASK_GET(me, STAT, PPS) == PKE_REG_STAT_PPS_IDLE) && (me->flags & PKE_FLAG_PENDING_PSS) != 0) { me->flags &= ~PKE_FLAG_PENDING_PSS; PKE_REG_MASK_SET(me, STAT, PSS, 1); } /* check for stall/halt control bits */ if(PKE_REG_MASK_GET(me, STAT, PFS) || PKE_REG_MASK_GET(me, STAT, PSS) || /* note special treatment below */ /* PEW bit not a reason to keep stalling - it's just an indication, re-computed below */ /* PGW bit not a reason to keep stalling - it's just an indication, re-computed below */ /* ER0/ER1 not a reason to keep stalling - it's just an indication */ PKE_REG_MASK_GET(me, STAT, PIS)) { /* (still) stalled */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_STALL); /* try again next cycle */ return; } /* 3 -- decode PKE instruction */ /* decoding */ if(PKE_REG_MASK_GET(me, STAT, PPS) == PKE_REG_STAT_PPS_IDLE) PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_DECODE); /* Extract relevant bits from PKEcode */ intr = BIT_MASK_GET(fw, PKE_OPCODE_I_B, PKE_OPCODE_I_E); cmd = BIT_MASK_GET(fw, PKE_OPCODE_CMD_B, PKE_OPCODE_CMD_E); /* handle interrupts */ if(intr) { /* are we resuming an interrupt-stalled instruction? */ if(me->flags & PKE_FLAG_INT_NOLOOP) { /* clear loop-prevention flag */ me->flags &= ~PKE_FLAG_INT_NOLOOP; /* fall through to decode & execute */ /* The pke_code_* functions should not check the MSB in the pkecode. */ } else /* new interrupt-flagged instruction */ { /* set INT flag in STAT register */ PKE_REG_MASK_SET(me, STAT, INT, 1); /* set loop-prevention flag */ me->flags |= PKE_FLAG_INT_NOLOOP; /* set PIS if stall not masked */ if(!PKE_REG_MASK_GET(me, ERR, MII)) pke_begin_interrupt_stall(me); /* suspend this instruction unless it's PKEMARK */ if(!IS_PKE_CMD(cmd, PKEMARK)) { PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_STALL); return; } else { ; /* fall through to decode & execute */ } } } /* decode & execute */ if(IS_PKE_CMD(cmd, PKENOP)) pke_code_nop(me, fw); else if(IS_PKE_CMD(cmd, STCYCL)) pke_code_stcycl(me, fw); else if(me->pke_number == 1 && IS_PKE_CMD(cmd, OFFSET)) pke_code_offset(me, fw); else if(me->pke_number == 1 && IS_PKE_CMD(cmd, BASE)) pke_code_base(me, fw); else if(IS_PKE_CMD(cmd, ITOP)) pke_code_itop(me, fw); else if(IS_PKE_CMD(cmd, STMOD)) pke_code_stmod(me, fw); else if(me->pke_number == 1 && IS_PKE_CMD(cmd, MSKPATH3)) pke_code_mskpath3(me, fw); else if(IS_PKE_CMD(cmd, PKEMARK)) pke_code_pkemark(me, fw); else if(IS_PKE_CMD(cmd, FLUSHE)) pke_code_flushe(me, fw); else if(me->pke_number == 1 && IS_PKE_CMD(cmd, FLUSH)) pke_code_flush(me, fw); else if(me->pke_number == 1 && IS_PKE_CMD(cmd, FLUSHA)) pke_code_flusha(me, fw); else if(IS_PKE_CMD(cmd, PKEMSCAL)) pke_code_pkemscal(me, fw); else if(IS_PKE_CMD(cmd, PKEMSCNT)) pke_code_pkemscnt(me, fw); else if(me->pke_number == 1 && IS_PKE_CMD(cmd, PKEMSCALF)) pke_code_pkemscalf(me, fw); else if(IS_PKE_CMD(cmd, STMASK)) pke_code_stmask(me, fw); else if(IS_PKE_CMD(cmd, STROW)) pke_code_strow(me, fw); else if(IS_PKE_CMD(cmd, STCOL)) pke_code_stcol(me, fw); else if(IS_PKE_CMD(cmd, MPG)) pke_code_mpg(me, fw); else if(IS_PKE_CMD(cmd, DIRECT)) pke_code_direct(me, fw); else if(IS_PKE_CMD(cmd, DIRECTHL)) pke_code_directhl(me, fw); else if(IS_PKE_CMD(cmd, UNPACK)) pke_code_unpack(me, fw); /* ... no other commands ... */ else pke_code_error(me, fw); } /* Clear out contents of FIFO; act as if it was empty. Return PC pointing to one-past-last word. */ unsigned_4 pke_fifo_flush(struct pke_fifo* fifo) { /* don't modify any state! */ return fifo->origin + fifo->next; } /* Clear out contents of FIFO; make it really empty. */ void pke_fifo_reset(struct pke_fifo* fifo) { int i; /* clear fifo quadwords */ for(i=0; inext; i++) { zfree(fifo->quadwords[i]); fifo->quadwords[i] = NULL; } /* reset pointers */ fifo->origin = 0; fifo->next = 0; } /* Make space for the next quadword in the FIFO. Allocate/enlarge FIFO pointer block if necessary. Return a pointer to it. */ struct fifo_quadword* pke_fifo_fit(struct pke_fifo* fifo) { struct fifo_quadword* fqw; /* out of space on quadword pointer array? */ if(fifo->next == fifo->length) /* also triggered before fifo->quadwords allocated */ { struct fifo_quadword** new_qw; unsigned_4 new_length = fifo->length + PKE_FIFO_GROW_SIZE; /* allocate new pointer block */ new_qw = zalloc(new_length * sizeof(struct fifo_quadword*)); ASSERT(new_qw != NULL); /* copy over old contents, if any */ if(fifo->quadwords != NULL) { /* copy over old pointers to beginning of new block */ memcpy(new_qw, fifo->quadwords, fifo->length * sizeof(struct fifo_quadword*)); /* free old block */ zfree(fifo->quadwords); } /* replace pointers & counts */ fifo->quadwords = new_qw; fifo->length = new_length; } /* sanity check */ ASSERT(fifo->quadwords != NULL); /* allocate new quadword from heap */ fqw = zalloc(sizeof(struct fifo_quadword)); ASSERT(fqw != NULL); /* push quadword onto fifo */ fifo->quadwords[fifo->next] = fqw; fifo->next++; return fqw; } /* Return a pointer to the FIFO quadword with given absolute index, or NULL if it is out of range */ struct fifo_quadword* pke_fifo_access(struct pke_fifo* fifo, unsigned_4 qwnum) { struct fifo_quadword* fqw; if((qwnum < fifo->origin) || /* before history */ (qwnum >= fifo->origin + fifo->next)) /* after last available quadword */ fqw = NULL; else { ASSERT(fifo->quadwords != NULL); /* must be allocated already */ fqw = fifo->quadwords[qwnum - fifo->origin]; /* pull out pointer from array */ ASSERT(fqw != NULL); /* must be allocated already */ } return fqw; } /* Authorize release of any FIFO entries older than given absolute quadword. */ void pke_fifo_old(struct pke_fifo* fifo, unsigned_4 qwnum) { /* do we have any too-old FIFO elements? */ if(fifo->origin + PKE_FIFO_ARCHEOLOGY < qwnum) { /* count quadwords to forget */ int horizon = qwnum - (fifo->origin + PKE_FIFO_ARCHEOLOGY); int i; /* free quadwords at indices below horizon */ for(i=0; i < horizon; i++) zfree(fifo->quadwords[i]); /* move surviving quadword pointers down to beginning of array */ for(i=horizon; i < fifo->next; i++) fifo->quadwords[i-horizon] = fifo->quadwords[i]; /* clear duplicate pointers */ for(i=fifo->next - horizon; i < fifo->next; i++) fifo->quadwords[i] = NULL; /* adjust FIFO pointers */ fifo->origin = fifo->origin + horizon; fifo->next = fifo->next - horizon; } } /* advance the PC by given number of data words; update STAT/FQC field; assume FIFO is filled enough; classify passed-over words; write FIFO trace line */ void pke_pc_advance(struct pke_device* me, int num_words) { int num = num_words; struct fifo_quadword* fq = NULL; unsigned_4 old_fifo_pc = me->fifo_pc; ASSERT(num_words >= 0); /* printf("pke %d pc_advance num_words %d\n", me->pke_number, num_words); */ while(1) { /* find next quadword, if any */ fq = pke_fifo_access(& me->fifo, me->fifo_pc); /* skip over DMA tag words if present in word 0 or 1 */ if(fq != NULL && fq->word_class[me->qw_pc] == wc_dma) { /* skip by going around loop an extra time */ num ++; } /* nothing left to skip / no DMA tag here */ if(num == 0) break; /* we are supposed to skip existing words */ ASSERT(fq != NULL); /* one word skipped */ num --; /* point to next word */ me->qw_pc ++; if(me->qw_pc == 4) { me->qw_pc = 0; me->fifo_pc ++; /* trace the consumption of the FIFO quadword we just skipped over */ /* fq still points to it */ if(me->fifo_trace_file != NULL) { /* assert complete classification */ ASSERT(fq->word_class[3] != wc_unknown); ASSERT(fq->word_class[2] != wc_unknown); ASSERT(fq->word_class[1] != wc_unknown); ASSERT(fq->word_class[0] != wc_unknown); /* print trace record */ fprintf(me->fifo_trace_file, "%d 0x%08x_%08x_%08x_%08x 0x%08x %c%c%c%c\n", (me->pke_number == 0 ? 0 : 1), (unsigned) fq->data[3], (unsigned) fq->data[2], (unsigned) fq->data[1], (unsigned) fq->data[0], (unsigned) fq->source_address, fq->word_class[3], fq->word_class[2], fq->word_class[1], fq->word_class[0]); } } /* next quadword */ } /* age old entries before PC */ if(me->fifo_pc != old_fifo_pc) { /* we advanced the fifo-pc; authorize disposal of anything before previous PKEcode */ pke_fifo_old(& me->fifo, old_fifo_pc); } /* clear FQC if FIFO is now empty */ fq = pke_fifo_access(& me->fifo, me->fifo_pc); if(fq == NULL) { PKE_REG_MASK_SET(me, STAT, FQC, 0); } else /* annote the word where the PC lands as an PKEcode */ { ASSERT(fq->word_class[me->qw_pc] == wc_pkecode || fq->word_class[me->qw_pc] == wc_unknown); fq->word_class[me->qw_pc] = wc_pkecode; } } /* Return pointer to FIFO quadword containing given operand# in FIFO. `operand_num' starts at 1. Return pointer to operand word in last argument, if non-NULL. If FIFO is not full enough, return 0. Signal an ER0 indication upon skipping a DMA tag. */ struct fifo_quadword* pke_pcrel_fifo(struct pke_device* me, int operand_num, unsigned_4** operand) { int num; int new_qw_pc, new_fifo_pc; struct fifo_quadword* fq = NULL; /* check for validity of last search results in cache */ if(me->last_fifo_pc == me->fifo_pc && me->last_qw_pc == me->qw_pc && operand_num > me->last_num) { /* continue search from last stop */ new_fifo_pc = me->last_new_fifo_pc; new_qw_pc = me->last_new_qw_pc; num = operand_num - me->last_num; } else { /* start search from scratch */ new_fifo_pc = me->fifo_pc; new_qw_pc = me->qw_pc; num = operand_num; } ASSERT(num > 0); /* printf("pke %d pcrel_fifo operand_num %d\n", me->pke_number, operand_num); */ do { /* one word skipped */ num --; /* point to next word */ new_qw_pc ++; if(new_qw_pc == 4) { new_qw_pc = 0; new_fifo_pc ++; } fq = pke_fifo_access(& me->fifo, new_fifo_pc); /* check for FIFO underflow */ if(fq == NULL) break; /* skip over DMA tag words if present in word 0 or 1 */ if(fq->word_class[new_qw_pc] == wc_dma) { /* set ER0 */ PKE_REG_MASK_SET(me, STAT, ER0, 1); /* mismatch error! */ if(! PKE_REG_MASK_GET(me, ERR, ME0)) { pke_begin_interrupt_stall(me); /* don't stall just yet -- finish this instruction */ /* the PPS_STALL state will be entered by pke_issue() next time */ } /* skip by going around loop an extra time */ num ++; } } while(num > 0); /* return pointer to operand word itself */ if(fq != NULL) { *operand = & fq->data[new_qw_pc]; /* annote the word where the pseudo-PC lands as an PKE operand */ ASSERT(fq->word_class[new_qw_pc] == wc_pkedata || fq->word_class[new_qw_pc] == wc_unknown); fq->word_class[new_qw_pc] = wc_pkedata; /* store search results in cache */ /* keys */ me->last_fifo_pc = me->fifo_pc; me->last_qw_pc = me->qw_pc; /* values */ me->last_num = operand_num; me->last_new_fifo_pc = new_fifo_pc; me->last_new_qw_pc = new_qw_pc; } return fq; } /* Return pointer to given operand# in FIFO. `operand_num' starts at 1. If FIFO is not full enough, return 0. Skip over DMA tags, but mark them as an error (ER0). */ unsigned_4* pke_pcrel_operand(struct pke_device* me, int operand_num) { unsigned_4* operand = NULL; struct fifo_quadword* fifo_operand; fifo_operand = pke_pcrel_fifo(me, operand_num, & operand); if(fifo_operand == NULL) ASSERT(operand == NULL); /* pke_pcrel_fifo() ought leave it untouched */ return operand; } /* Return a bit-field extract of given operand# in FIFO, and its source-addr. `bit_offset' starts at 0, referring to LSB after PKE instruction word. Width must be >0, <=32. Assume FIFO is full enough. Skip over DMA tags, but mark them as an error (ER0). */ unsigned_4 pke_pcrel_operand_bits(struct pke_device* me, int bit_offset, int bit_width, unsigned_4* source_addr) { unsigned_4* word = NULL; unsigned_4 value; struct fifo_quadword* fifo_operand; int wordnumber, bitnumber; wordnumber = bit_offset/32; bitnumber = bit_offset%32; /* find operand word with bitfield */ fifo_operand = pke_pcrel_fifo(me, wordnumber + 1, &word); ASSERT(word != NULL); /* extract bitfield from word */ value = BIT_MASK_GET(*word, bitnumber, bitnumber + bit_width - 1); /* extract source addr from fifo word */ *source_addr = fifo_operand->source_address; return value; } /* check for stall conditions on indicated devices (path* only on PKE1), do not change status; return 0 iff no stall */ int pke_check_stall(struct pke_device* me, enum pke_check_target what) { int any_stall = 0; unsigned_4 cop2_stat, gpuif_stat; /* read status words */ ASSERT(sizeof(unsigned_4) == 4); PKE_MEM_READ(me, (GIF_REG_STAT), & gpuif_stat, 4); PKE_MEM_READ(me, (COP2_REG_STAT_ADDR), & cop2_stat, 4); /* perform checks */ if(what == chk_vu) { if(me->pke_number == 0) any_stall = BIT_MASK_GET(cop2_stat, COP2_REG_STAT_VBS0_B, COP2_REG_STAT_VBS0_E); else /* if(me->pke_number == 1) */ any_stall = BIT_MASK_GET(cop2_stat, COP2_REG_STAT_VBS1_B, COP2_REG_STAT_VBS1_E); } else if(what == chk_path1) /* VU -> GPUIF */ { if(BIT_MASK_GET(gpuif_stat, GPUIF_REG_STAT_APATH_B, GPUIF_REG_STAT_APATH_E) == 1) any_stall = 1; } else if(what == chk_path2) /* PKE -> GPUIF */ { if(BIT_MASK_GET(gpuif_stat, GPUIF_REG_STAT_APATH_B, GPUIF_REG_STAT_APATH_E) == 2) any_stall = 1; } else if(what == chk_path3) /* DMA -> GPUIF */ { if(BIT_MASK_GET(gpuif_stat, GPUIF_REG_STAT_APATH_B, GPUIF_REG_STAT_APATH_E) == 3) any_stall = 1; } else { /* invalid what */ ASSERT(0); } /* any stall reasons? */ return any_stall; } /* PKE1 only: flip the DBF bit; recompute TOPS, TOP */ void pke_flip_dbf(struct pke_device* me) { int newdf; /* compute new TOP */ PKE_REG_MASK_SET(me, TOP, TOP, PKE_REG_MASK_GET(me, TOPS, TOPS)); /* flip DBF */ newdf = PKE_REG_MASK_GET(me, DBF, DF) ? 0 : 1; PKE_REG_MASK_SET(me, DBF, DF, newdf); PKE_REG_MASK_SET(me, STAT, DBF, newdf); /* compute new TOPS */ PKE_REG_MASK_SET(me, TOPS, TOPS, (PKE_REG_MASK_GET(me, BASE, BASE) + newdf * PKE_REG_MASK_GET(me, OFST, OFFSET))); /* this is equivalent to last word from okadaa (98-02-25): 1) TOP=TOPS; 2) TOPS=BASE + !DBF*OFFSET 3) DBF=!DBF */ } /* set the STAT:PIS bit and send an interrupt to the 5900 */ void pke_begin_interrupt_stall(struct pke_device* me) { /* set PIS */ PKE_REG_MASK_SET(me, STAT, PIS, 1); /* XXX: send interrupt to 5900? */ } /* PKEcode handler functions -- responsible for checking and confirming old stall conditions, executing pkecode, updating PC and status registers -- may assume being run on correct PKE unit */ void pke_code_nop(struct pke_device* me, unsigned_4 pkecode) { /* done */ pke_pc_advance(me, 1); PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); } void pke_code_stcycl(struct pke_device* me, unsigned_4 pkecode) { int imm = BIT_MASK_GET(pkecode, PKE_OPCODE_IMM_B, PKE_OPCODE_IMM_E); /* copy immediate value into CYCLE reg */ PKE_REG_MASK_SET(me, CYCLE, WL, BIT_MASK_GET(imm, 8, 15)); PKE_REG_MASK_SET(me, CYCLE, CL, BIT_MASK_GET(imm, 0, 7)); /* done */ pke_pc_advance(me, 1); PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); } void pke_code_offset(struct pke_device* me, unsigned_4 pkecode) { int imm = BIT_MASK_GET(pkecode, PKE_OPCODE_IMM_B, PKE_OPCODE_IMM_E); /* copy 10 bits to OFFSET field */ PKE_REG_MASK_SET(me, OFST, OFFSET, BIT_MASK_GET(imm, 0, 9)); /* clear DBF bit */ PKE_REG_MASK_SET(me, DBF, DF, 0); /* clear other DBF bit */ PKE_REG_MASK_SET(me, STAT, DBF, 0); /* set TOPS = BASE */ PKE_REG_MASK_SET(me, TOPS, TOPS, PKE_REG_MASK_GET(me, BASE, BASE)); /* done */ pke_pc_advance(me, 1); PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); } void pke_code_base(struct pke_device* me, unsigned_4 pkecode) { int imm = BIT_MASK_GET(pkecode, PKE_OPCODE_IMM_B, PKE_OPCODE_IMM_E); /* copy 10 bits to BASE field */ PKE_REG_MASK_SET(me, BASE, BASE, BIT_MASK_GET(imm, 0, 9)); /* done */ pke_pc_advance(me, 1); PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); } void pke_code_itop(struct pke_device* me, unsigned_4 pkecode) { int imm = BIT_MASK_GET(pkecode, PKE_OPCODE_IMM_B, PKE_OPCODE_IMM_E); /* copy 10 bits to ITOPS field */ PKE_REG_MASK_SET(me, ITOPS, ITOPS, BIT_MASK_GET(imm, 0, 9)); /* done */ pke_pc_advance(me, 1); PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); } void pke_code_stmod(struct pke_device* me, unsigned_4 pkecode) { int imm = BIT_MASK_GET(pkecode, PKE_OPCODE_IMM_B, PKE_OPCODE_IMM_E); /* copy 2 bits to MODE register */ PKE_REG_MASK_SET(me, MODE, MDE, BIT_MASK_GET(imm, 0, 2)); /* done */ pke_pc_advance(me, 1); PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); } void pke_code_mskpath3(struct pke_device* me, unsigned_4 pkecode) { int imm = BIT_MASK_GET(pkecode, PKE_OPCODE_IMM_B, PKE_OPCODE_IMM_E); unsigned_4 gif_mode; /* set appropriate bit */ if(BIT_MASK_GET(imm, PKE_REG_MSKPATH3_B, PKE_REG_MSKPATH3_E) != 0) gif_mode = GIF_REG_MODE_M3R_MASK; else gif_mode = 0; /* write register; patrickm code will look at M3R bit only */ PKE_MEM_WRITE(me, GIF_REG_MODE, & gif_mode, 4); /* done */ pke_pc_advance(me, 1); PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); } void pke_code_pkemark(struct pke_device* me, unsigned_4 pkecode) { int imm = BIT_MASK_GET(pkecode, PKE_OPCODE_IMM_B, PKE_OPCODE_IMM_E); /* copy 16 bits to MARK register */ PKE_REG_MASK_SET(me, MARK, MARK, BIT_MASK_GET(imm, 0, 15)); /* set MRK bit in STAT register - CPU2 v2.1 docs incorrect */ PKE_REG_MASK_SET(me, STAT, MRK, 1); /* done */ pke_pc_advance(me, 1); PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); } void pke_code_flushe(struct pke_device* me, unsigned_4 pkecode) { /* compute next PEW bit */ if(pke_check_stall(me, chk_vu)) { /* VU busy */ PKE_REG_MASK_SET(me, STAT, PEW, 1); PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_STALL); /* try again next cycle */ } else { /* VU idle */ PKE_REG_MASK_SET(me, STAT, PEW, 0); PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); pke_pc_advance(me, 1); } } void pke_code_flush(struct pke_device* me, unsigned_4 pkecode) { int something_busy = 0; /* compute next PEW, PGW bits */ if(pke_check_stall(me, chk_vu)) { something_busy = 1; PKE_REG_MASK_SET(me, STAT, PEW, 1); } else PKE_REG_MASK_SET(me, STAT, PEW, 0); if(pke_check_stall(me, chk_path1) || pke_check_stall(me, chk_path2)) { something_busy = 1; PKE_REG_MASK_SET(me, STAT, PGW, 1); } else PKE_REG_MASK_SET(me, STAT, PGW, 0); /* go or no go */ if(something_busy) { PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_WAIT); /* try again next cycle */ } else { /* all idle */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); pke_pc_advance(me, 1); } } void pke_code_flusha(struct pke_device* me, unsigned_4 pkecode) { int something_busy = 0; /* compute next PEW, PGW bits */ if(pke_check_stall(me, chk_vu)) { something_busy = 1; PKE_REG_MASK_SET(me, STAT, PEW, 1); } else PKE_REG_MASK_SET(me, STAT, PEW, 0); if(pke_check_stall(me, chk_path1) || pke_check_stall(me, chk_path2) || pke_check_stall(me, chk_path3)) { something_busy = 1; PKE_REG_MASK_SET(me, STAT, PGW, 1); } else PKE_REG_MASK_SET(me, STAT, PGW, 0); if(something_busy) { PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_WAIT); /* try again next cycle */ } else { /* all idle */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); pke_pc_advance(me, 1); } } void pke_code_pkemscal(struct pke_device* me, unsigned_4 pkecode) { /* compute next PEW bit */ if(pke_check_stall(me, chk_vu)) { /* VU busy */ PKE_REG_MASK_SET(me, STAT, PEW, 1); PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_STALL); /* try again next cycle */ } else { unsigned_4 vu_pc; int imm = BIT_MASK_GET(pkecode, PKE_OPCODE_IMM_B, PKE_OPCODE_IMM_E); /* VU idle */ PKE_REG_MASK_SET(me, STAT, PEW, 0); /* flip DBF on PKE1 */ if(me->pke_number == 1) pke_flip_dbf(me); /* compute new PC for VU (host byte-order) */ vu_pc = BIT_MASK_GET(imm, 0, 15); vu_pc = T2H_4(vu_pc); /* write new PC; callback function gets VU running */ ASSERT(sizeof(unsigned_4) == 4); PKE_MEM_WRITE(me, (me->pke_number == 0 ? VU0_CIA : VU1_CIA), & vu_pc, 4); /* copy ITOPS field to ITOP */ PKE_REG_MASK_SET(me, ITOP, ITOP, PKE_REG_MASK_GET(me, ITOPS, ITOPS)); /* done */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); pke_pc_advance(me, 1); } } void pke_code_pkemscnt(struct pke_device* me, unsigned_4 pkecode) { /* compute next PEW bit */ if(pke_check_stall(me, chk_vu)) { /* VU busy */ PKE_REG_MASK_SET(me, STAT, PEW, 1); PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_STALL); /* try again next cycle */ } else { unsigned_4 vu_pc; /* VU idle */ PKE_REG_MASK_SET(me, STAT, PEW, 0); /* flip DBF on PKE1 */ if(me->pke_number == 1) pke_flip_dbf(me); /* read old PC */ ASSERT(sizeof(unsigned_4) == 4); PKE_MEM_READ(me, (me->pke_number == 0 ? VU0_CIA : VU1_CIA), & vu_pc, 4); /* rewrite new PC; callback function gets VU running */ ASSERT(sizeof(unsigned_4) == 4); PKE_MEM_WRITE(me, (me->pke_number == 0 ? VU0_CIA : VU1_CIA), & vu_pc, 4); /* copy ITOPS field to ITOP */ PKE_REG_MASK_SET(me, ITOP, ITOP, PKE_REG_MASK_GET(me, ITOPS, ITOPS)); /* done */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); pke_pc_advance(me, 1); } } void pke_code_pkemscalf(struct pke_device* me, unsigned_4 pkecode) { int something_busy = 0; /* compute next PEW, PGW bits */ if(pke_check_stall(me, chk_vu)) { something_busy = 1; PKE_REG_MASK_SET(me, STAT, PEW, 1); } else PKE_REG_MASK_SET(me, STAT, PEW, 0); if(pke_check_stall(me, chk_path1) || pke_check_stall(me, chk_path2) || pke_check_stall(me, chk_path3)) { something_busy = 1; PKE_REG_MASK_SET(me, STAT, PGW, 1); } else PKE_REG_MASK_SET(me, STAT, PGW, 0); /* go or no go */ if(something_busy) { PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_WAIT); /* try again next cycle */ } else { unsigned_4 vu_pc; int imm = BIT_MASK_GET(pkecode, PKE_OPCODE_IMM_B, PKE_OPCODE_IMM_E); /* flip DBF on PKE1 */ if(me->pke_number == 1) pke_flip_dbf(me); /* compute new PC for VU (host byte-order) */ vu_pc = BIT_MASK_GET(imm, 0, 15); vu_pc = T2H_4(vu_pc); /* rewrite new PC; callback function gets VU running */ ASSERT(sizeof(unsigned_4) == 4); PKE_MEM_WRITE(me, (me->pke_number == 0 ? VU0_CIA : VU1_CIA), & vu_pc, 4); /* copy ITOPS field to ITOP */ PKE_REG_MASK_SET(me, ITOP, ITOP, PKE_REG_MASK_GET(me, ITOPS, ITOPS)); /* done */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); pke_pc_advance(me, 1); } } void pke_code_stmask(struct pke_device* me, unsigned_4 pkecode) { unsigned_4* mask; /* check that FIFO has one more word for STMASK operand */ mask = pke_pcrel_operand(me, 1); if(mask != NULL) { /* "transferring" operand */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_XFER); /* set NUM */ PKE_REG_MASK_SET(me, NUM, NUM, 1); /* fill the register */ PKE_REG_MASK_SET(me, MASK, MASK, *mask); /* set NUM */ PKE_REG_MASK_SET(me, NUM, NUM, 0); /* done */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); pke_pc_advance(me, 2); } else { /* need to wait for another word */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_WAIT); /* try again next cycle */ } } void pke_code_strow(struct pke_device* me, unsigned_4 pkecode) { /* check that FIFO has four more words for STROW operand */ unsigned_4* last_op; last_op = pke_pcrel_operand(me, 4); if(last_op != NULL) { /* "transferring" operand */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_XFER); /* set NUM */ PKE_REG_MASK_SET(me, NUM, NUM, 1); /* copy ROW registers: must all exist if 4th operand exists */ me->regs[PKE_REG_R0][0] = * pke_pcrel_operand(me, 1); me->regs[PKE_REG_R1][0] = * pke_pcrel_operand(me, 2); me->regs[PKE_REG_R2][0] = * pke_pcrel_operand(me, 3); me->regs[PKE_REG_R3][0] = * pke_pcrel_operand(me, 4); /* set NUM */ PKE_REG_MASK_SET(me, NUM, NUM, 0); /* done */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); pke_pc_advance(me, 5); } else { /* need to wait for another word */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_WAIT); /* try again next cycle */ } } void pke_code_stcol(struct pke_device* me, unsigned_4 pkecode) { /* check that FIFO has four more words for STCOL operand */ unsigned_4* last_op; last_op = pke_pcrel_operand(me, 4); if(last_op != NULL) { /* "transferring" operand */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_XFER); /* set NUM */ PKE_REG_MASK_SET(me, NUM, NUM, 1); /* copy COL registers: must all exist if 4th operand exists */ me->regs[PKE_REG_C0][0] = * pke_pcrel_operand(me, 1); me->regs[PKE_REG_C1][0] = * pke_pcrel_operand(me, 2); me->regs[PKE_REG_C2][0] = * pke_pcrel_operand(me, 3); me->regs[PKE_REG_C3][0] = * pke_pcrel_operand(me, 4); /* set NUM */ PKE_REG_MASK_SET(me, NUM, NUM, 0); /* done */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); pke_pc_advance(me, 5); } else { /* need to wait for another word */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_WAIT); /* try again next cycle */ } } void pke_code_mpg(struct pke_device* me, unsigned_4 pkecode) { unsigned_4* last_mpg_word; int num = BIT_MASK_GET(pkecode, PKE_OPCODE_NUM_B, PKE_OPCODE_NUM_E); int imm = BIT_MASK_GET(pkecode, PKE_OPCODE_IMM_B, PKE_OPCODE_IMM_E); /* assert 64-bit alignment of MPG operand */ if(me->qw_pc != 3 && me->qw_pc != 1) return pke_code_error(me, pkecode); /* map zero to max+1 */ if(num==0) num=0x100; /* check that FIFO has a few more words for MPG operand */ last_mpg_word = pke_pcrel_operand(me, num*2); /* num: number of 64-bit words */ if(last_mpg_word != NULL) { /* perform implied FLUSHE */ if(pke_check_stall(me, chk_vu)) { /* VU busy */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_STALL); /* retry this instruction next clock */ } else { /* VU idle */ int i; /* "transferring" operand */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_XFER); /* set NUM */ PKE_REG_MASK_SET(me, NUM, NUM, num); /* transfer VU instructions, one word-pair per iteration */ for(i=0; ipke_number == 0) ? VU0_MEM0_WINDOW_START : VU1_MEM0_WINDOW_START; vu_addr_max_size = (me->pke_number == 0) ? VU0_MEM0_SIZE : VU1_MEM0_SIZE; vutrack_addr_base = (me->pke_number == 0) ? VU0_MEM0_SRCADDR_START : VU1_MEM0_SRCADDR_START; /* compute VU address for this word-pair */ vu_addr = vu_addr_base + (imm + i) * 8; /* check for vu_addr overflow */ while(vu_addr >= vu_addr_base + vu_addr_max_size) vu_addr -= vu_addr_max_size; /* compute VU tracking address */ vutrack_addr = vutrack_addr_base + ((signed_8)vu_addr - (signed_8)vu_addr_base) / 2; /* Fetch operand words; assume they are already little-endian for VU imem */ fq = pke_pcrel_fifo(me, i*2 + 1, & operand); vu_lower_opcode = *operand; vu_upper_opcode = *pke_pcrel_operand(me, i*2 + 2); /* write data into VU memory */ /* lower (scalar) opcode comes in first word ; macro performs H2T! */ PKE_MEM_WRITE(me, vu_addr, & vu_lower_opcode, 4); /* upper (vector) opcode comes in second word ; H2T */ ASSERT(sizeof(unsigned_4) == 4); PKE_MEM_WRITE(me, vu_addr + 4, & vu_upper_opcode, 4); /* write tracking address in target byte-order */ ASSERT(sizeof(unsigned_4) == 4); PKE_MEM_WRITE(me, vutrack_addr, & fq->source_address, 4); } /* VU xfer loop */ /* check NUM */ ASSERT(PKE_REG_MASK_GET(me, NUM, NUM) == 0); /* done */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); pke_pc_advance(me, 1 + num*2); } } /* if FIFO full enough */ else { /* need to wait for another word */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_WAIT); /* retry this instruction next clock */ } } void pke_code_direct(struct pke_device* me, unsigned_4 pkecode) { /* check that FIFO has a few more words for DIRECT operand */ unsigned_4* last_direct_word; int imm = BIT_MASK_GET(pkecode, PKE_OPCODE_IMM_B, PKE_OPCODE_IMM_E); /* assert 128-bit alignment of DIRECT operand */ if(me->qw_pc != 3) return pke_code_error(me, pkecode); /* map zero to max+1 */ if(imm==0) imm=0x10000; last_direct_word = pke_pcrel_operand(me, imm*4); /* imm: number of 128-bit words */ if(last_direct_word != NULL) { /* VU idle */ int i; unsigned_16 fifo_data; /* "transferring" operand */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_XFER); /* transfer GPUIF quadwords, one word per iteration */ for(i=0; i= addrwl) n = num; else n = cl * (nummx / addrwl) + PKE_LIMIT(nummx % addrwl, cl); num_operands = (31 + (32 >> vl) * (vn+1) * n)/32; /* round up to next word */ /* confirm that FIFO has enough words in it */ if(num_operands > 0) last_operand_word = pke_pcrel_operand(me, num_operands); if(last_operand_word != NULL || num_operands == 0) { address_word vu_addr_base, vutrack_addr_base; address_word vu_addr_max_size; int vector_num_out, vector_num_in; /* "transferring" operand */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_XFER); /* don't check whether VU is idle */ /* compute VU address base */ if(me->pke_number == 0) { vu_addr_base = VU0_MEM1_WINDOW_START; vu_addr_max_size = VU0_MEM1_SIZE; vutrack_addr_base = VU0_MEM1_SRCADDR_START; r = 0; } else { vu_addr_base = VU1_MEM1_WINDOW_START; vu_addr_max_size = VU1_MEM1_SIZE; vutrack_addr_base = VU1_MEM1_SRCADDR_START; } /* set NUM */ PKE_REG_MASK_SET(me, NUM, NUM, nummx); /* transfer given number of vectors */ vector_num_out = 0; /* output vector number being processed */ vector_num_in = 0; /* argument vector number being processed */ do { quadword vu_old_data; quadword vu_new_data; quadword unpacked_data; address_word vu_addr; address_word vutrack_addr; unsigned_4 source_addr = 0; int i; int next_num; /* decrement NUM */ next_num = PKE_REG_MASK_GET(me, NUM, NUM) - 1; PKE_REG_MASK_SET(me, NUM, NUM, next_num); /* compute VU destination address, as bytes in R5900 memory */ if(cl >= wl) { /* map zero to max+1 */ vu_addr = vu_addr_base + 16 * (BIT_MASK_GET(imm, 0, 9) + (vector_num_out / addrwl) * cl + (vector_num_out % addrwl)); } else vu_addr = vu_addr_base + 16 * (BIT_MASK_GET(imm, 0, 9) + vector_num_out); /* handle "R" double-buffering bit */ if(r) vu_addr += 16 * PKE_REG_MASK_GET(me, TOPS, TOPS); /* check for vu_addr overflow */ while(vu_addr >= vu_addr_base + vu_addr_max_size) vu_addr -= vu_addr_max_size; /* compute address of tracking table entry */ vutrack_addr = vutrack_addr_base + ((signed_8)vu_addr - (signed_8)vu_addr_base) / 4; /* read old VU data word at address; reverse words if needed */ { unsigned_16 vu_old_badwords; ASSERT(sizeof(vu_old_badwords) == 16); PKE_MEM_READ(me, vu_addr, &vu_old_badwords, 16); vu_old_data[0] = * A4_16(& vu_old_badwords, 3); vu_old_data[1] = * A4_16(& vu_old_badwords, 2); vu_old_data[2] = * A4_16(& vu_old_badwords, 1); vu_old_data[3] = * A4_16(& vu_old_badwords, 0); } /* For cyclic unpack, next operand quadword may come from instruction stream or be zero. */ if((cl < addrwl) && (vector_num_out % addrwl) >= cl) { /* clear operand - used only in a "indeterminate" state */ for(i = 0; i < 4; i++) unpacked_data[i] = 0; } else { /* compute packed vector dimensions */ int vectorbits = 0, unitbits = 0; if(vl < 3) /* PKE_UNPACK_*_{32,16,8} */ { unitbits = (32 >> vl); vectorbits = unitbits * (vn+1); } else if(vl == 3 && vn == 3) /* PKE_UNPACK_V4_5 */ { unitbits = 5; vectorbits = 16; } else /* illegal unpack variant */ { /* should have been caught at top of function */ ASSERT(0); } /* loop over columns */ for(i=0; i<=vn; i++) { unsigned_4 operand; /* offset in bits in current operand word */ int bitoffset = (vector_num_in * vectorbits) + (i * unitbits); /* # of bits from PKEcode */ /* last unit of V4_5 is only one bit wide */ if(vl == 3 && vn == 3 && i == 3) /* PKE_UNPACK_V4_5 */ unitbits = 1; /* confirm we're not reading more than we said we needed */ if(vector_num_in * vectorbits >= num_operands * 32) { /* this condition may be triggered by illegal PKEcode / CYCLE combinations. */ pke_code_error(me, pkecode); /* XXX: this case needs to be better understood, and detected at a better time. */ return; } /* fetch bitfield operand */ operand = pke_pcrel_operand_bits(me, bitoffset, unitbits, & source_addr); /* selectively sign-extend; not for V4_5 1-bit value */ if(usn || unitbits == 1) unpacked_data[i] = operand; else unpacked_data[i] = SEXT32(operand, unitbits-1); } /* set remaining top words in vector */ for(i=vn+1; i<4; i++) { if(vn == 0) /* S_{32,16,8}: copy lowest element */ unpacked_data[i] = unpacked_data[0]; else unpacked_data[i] = 0; } /* consumed a vector from the PKE instruction stream */ vector_num_in ++; } /* unpack word from instruction operand */ /* process STMOD register for accumulation operations */ switch(PKE_REG_MASK_GET(me, MODE, MDE)) { case PKE_MODE_ADDROW: /* add row registers to output data */ for(i=0; i<4; i++) /* exploit R0..R3 contiguity */ unpacked_data[i] += me->regs[PKE_REG_R0 + i][0]; break; case PKE_MODE_ACCROW: /* add row registers to output data; accumulate */ for(i=0; i<4; i++) { /* exploit R0..R3 contiguity */ unpacked_data[i] += me->regs[PKE_REG_R0 + i][0]; me->regs[PKE_REG_R0 + i][0] = unpacked_data[i]; } break; case PKE_MODE_INPUT: /* pass data through */ default: /* specified as undefined */ ; } /* compute replacement word */ if(m) /* use mask register? */ { /* compute index into mask register for this word */ int mask_index = PKE_LIMIT(vector_num_out % addrwl, 3); for(i=0; i<4; i++) /* loop over columns */ { int mask_op = PKE_MASKREG_GET(me, mask_index, i); unsigned_4* masked_value = NULL; switch(mask_op) { case PKE_MASKREG_INPUT: masked_value = & unpacked_data[i]; break; case PKE_MASKREG_ROW: /* exploit R0..R3 contiguity */ masked_value = & me->regs[PKE_REG_R0 + i][0]; break; case PKE_MASKREG_COLUMN: /* exploit C0..C3 contiguity */ masked_value = & me->regs[PKE_REG_C0 + mask_index][0]; break; case PKE_MASKREG_NOTHING: /* "write inhibit" by re-copying old data */ masked_value = & vu_old_data[i]; break; default: ASSERT(0); /* no other cases possible */ } /* copy masked value for column */ vu_new_data[i] = *masked_value; } /* loop over columns */ } /* mask */ else { /* no mask - just copy over entire unpacked quadword */ memcpy(vu_new_data, unpacked_data, sizeof(unpacked_data)); } /* write new VU data word at address; reverse words if needed */ { unsigned_16 vu_new_badwords; * A4_16(& vu_new_badwords, 3) = vu_new_data[0]; * A4_16(& vu_new_badwords, 2) = vu_new_data[1]; * A4_16(& vu_new_badwords, 1) = vu_new_data[2]; * A4_16(& vu_new_badwords, 0) = vu_new_data[3]; ASSERT(sizeof(vu_new_badwords) == 16); PKE_MEM_WRITE(me, vu_addr, &vu_new_badwords, 16); } /* write tracking address */ ASSERT(sizeof(unsigned_4) == 4); PKE_MEM_WRITE(me, vutrack_addr, & source_addr, 4); /* next vector please */ vector_num_out ++; } /* vector transfer loop */ while(PKE_REG_MASK_GET(me, NUM, NUM) > 0); /* confirm we've written as many vectors as told */ ASSERT(nummx == vector_num_out); /* done */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); pke_pc_advance(me, 1 + num_operands); } /* PKE FIFO full enough */ else { /* need to wait for another word */ PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_WAIT); /* retry this instruction next clock */ } } void pke_code_error(struct pke_device* me, unsigned_4 pkecode) { /* set ER1 flag in STAT register */ PKE_REG_MASK_SET(me, STAT, ER1, 1); if(! PKE_REG_MASK_GET(me, ERR, ME1)) { pke_begin_interrupt_stall(me); PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_STALL); } else { PKE_REG_MASK_SET(me, STAT, PPS, PKE_REG_STAT_PPS_IDLE); } /* advance over faulty word */ pke_pc_advance(me, 1); }