Lots of new ethernet-related code (doesn't work yet)

The board is basically implemented. It's just a dummy slot ROM
with no driver or primary/secondary init, that looks enough
like the Apple EtherTalk card. The DP8390 controller chip
has its address space implemented, and some of its registers
work. Lots more work to do on that

With slog() tracing enabled, you can see A/UX try to send a
multicast ethernet frame, then give up waiting for some kind
of response from the chip, then decide that the ethernet
controller is dead and print an error to console
This commit is contained in:
name 2014-08-27 19:37:26 -04:00
parent 20fedf386b
commit fd31d642b0
9 changed files with 1040 additions and 6 deletions

View File

@ -575,6 +575,27 @@ uint32_t shoebill_install_tfb_card(shoebill_config_t *config, uint8_t slotnum)
return 1;
}
uint32_t shoebill_install_ethernet_card(shoebill_config_t *config, uint8_t slotnum, uint8_t ethernet_addr[6])
{
shoebill_card_ethernet_t *ctx;
if (shoe.slots[slotnum].card_type != card_none) {
sprintf(config->error_msg, "This slot (%u) already has a card\n", slotnum);
return 0;
}
ctx = p_alloc(shoe.pool, sizeof(shoebill_card_ethernet_t));
shoe.slots[slotnum].ctx = ctx;
shoe.slots[slotnum].card_type = card_shoebill_ethernet;
shoe.slots[slotnum].connected = 1;
shoe.slots[slotnum].read_func = nubus_ethernet_read_func;
shoe.slots[slotnum].write_func = nubus_ethernet_write_func;
shoe.slots[slotnum].interrupts_enabled = 1;
nubus_ethernet_init(ctx, slotnum, ethernet_addr);
return 1;
}
shoebill_video_frame_info_t shoebill_get_video_frame(uint8_t slotnum,
_Bool just_params)
{

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@ -0,0 +1,463 @@
/*
* Copyright (c) 2014, Peter Rutenbar <pruten@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include "shoebill.h"
#include "ethernet_rom/rom.c"
static uint32_t compute_nubus_crc(uint8_t *rom, uint32_t len)
{
uint32_t i, sum = 0;
for (i=0; i<len; i++) {
uint8_t byte = rom[i];
if (i==(len-9) || i==(len-10) || i==(len-11) || i==(len-12))
byte = 0;
sum = (sum << 1) + (sum >> 31) + byte;
}
rom[len-9] = sum & 0xff;
rom[len-10] = (sum >> 8) & 0xff;
rom[len-11] = (sum >> 16) & 0xff;
rom[len-12] = (sum >> 24) & 0xff;
return sum;
}
#define ETHPAGE() (ctx->cr >> 6)
const char *eth_r0_reg_names[16] = {
"cr", "clda0", "clda1", "bnry",
"tsr", "ncr", "fifo", "isr",
"crda0", "crda1", "reserved1", "reserved2",
"rsr", "cntr0", "cntr1", "cntr2"
};
const char *eth_1_reg_names[16] = {
"cr", "par0", "par1", "par2",
"par3", "par4", "par5", "curr",
"mar0", "mar1", "mar2", "mar3",
"mar4", "mar5", "mar6", "mar7"
};
const char *eth_w0_reg_names[16] = {
"cr", "pstart", "pstop", "bnry",
"tpsr", "tbcr0", "tbcr1", "isr",
"rsar0", "rsar1", "rbcr0", "rbcr1",
"rcr", "tcr", "dcr", "imr"
};
// command register bit masks
enum ether_cr_masks {
cr_stp = 1<<0, // stop
cr_sta = 1<<1, // start
cr_txp = 1<<2, // transmit packet
cr_rd0 = 1<<3, // remote dma command (0)
cr_rd1 = 1<<4, // remote dma command (1)
cr_rd2 = 1<<5, // remote dma command (2)
cr_ps0 = 1<<6, // page select (0)
cr_ps1 = 1<<7, // page select (1)
};
// interrupt service register bit masks
enum ether_isr_masks {
isr_prx = 1<<0, // packet received
isr_ptx = 1<<1, // packet transmitted
isr_rxe = 1<<2, // receive error
isr_txe = 1<<3, // transmit error
isr_ovw = 1<<4, // overwrite warning
isr_cnt = 1<<5, // counter overflow
isr_rdc = 1<<6, // remote dma complete
isr_rst = 1<<7, // reset status (not actually an interrupt)
};
// interrupt mask register bit masks
enum ether_imr_masks {
imr_pxre = 1<<0, // packet received interrupt enable
imr_ptxe = 1<<1, // packet transmitted interrupt enable
imr_rxee = 1<<2, // receive error interrupt enable
imr_txee = 1<<3, // transmit error interrupt enable
imr_ovwe = 1<<4, // overwrite warning interrupt enable
imr_cnte = 1<<5, // counter overflow interrupt enable
imr_rdce = 1<<6, // dma complete
};
// receive configuration register bit masks
enum ether_rcr_masks {
rcr_sep = 1<<0, // save error packets
rcr_ar = 1<<1, // accept runt packets
rcr_ab = 1<<2, // accept broadcast
rcr_am = 1<<3, // accept multicast
rcr_pro = 1<<4, // promiscuous physical
rcr_mon = 1<<5, // monitor mode
};
// transmit configuration register bit masks
enum ether_tcr_masks {
tcr_crc = 1<<0, // inhibit crc
tcr_lb0 = 1<<1, // encoded loopback control (0)
tcr_lb1 = 1<<2, // encoded loopback control (1)
tcr_atd = 1<<3, // auto transmit disable
tcr_ofst = 1<<4, // collision offset enable
};
// data configuration register bit masks
enum ether_dcr_masks {
dcr_wts = 1<<0, // word transfer select
dcr_bos = 1<<1, // byte order select
dcr_las = 1<<2, // long address select
dcr_ls = 1<<3, // loopback select
dcr_arm = 1<<4, // auto-initialize remote
dcr_ft0 = 1<<5, // fifo threshhold select (0)
dcr_ft1 = 1<<6, // fifo threshhold select (1)
};
void nubus_ethernet_init(void *_ctx, uint8_t slotnum, uint8_t ethernet_addr[6])
{
shoebill_card_ethernet_t *ctx = (shoebill_card_ethernet_t*)_ctx;
memset(ctx, 0, sizeof(shoebill_card_ethernet_t));
memcpy(ctx->rom, _ethernet_rom, 4096);
memcpy(ctx->ethernet_addr, ethernet_addr, 6);
memcpy(ctx->rom, ethernet_addr, 6);
ctx->rom[6] = 0x00;
ctx->rom[7] = 0x00;
/*
* The first 8 bytes contain the MAC address
* and aren't part of the CRC
*/
compute_nubus_crc(&ctx->rom[8], 4096 - 8);
ctx->cr |= cr_stp; // "STP powers up high"
ctx->isr |= isr_rst; // I presume ISR's RST powers up high too
}
uint32_t nubus_ethernet_read_func(const uint32_t rawaddr,
const uint32_t size,
const uint8_t slotnum)
{
shoebill_card_ethernet_t *ctx = (shoebill_card_ethernet_t*)shoe.slots[slotnum].ctx;
uint32_t result = 0;
switch ((rawaddr >> 16) & 0xf) {
case 0xd: { // ram
const uint16_t addr = rawaddr & 0xfff;
uint8_t *ram = ctx->ram;
if (size == 1)
result = ram[addr];
else if (size == 2) {
result = ram[addr] << 8;
result |= ram[(addr+1) & 0xfff];
}
else
assert(!"read: bogus size");
slog("ethernet: reading from ram addr 0x%x sz=%u ", addr, size);
goto done;
}
case 0xe: { // registers
// For some reason, the register address bits are all inverted
const uint8_t reg = 15 ^ ((rawaddr >> 2) & 15);
assert(size == 1);
{
const char *name = "???";
if (ETHPAGE() == 0) name = eth_r0_reg_names[reg];
else if (ETHPAGE() == 1) name = eth_1_reg_names[reg];
slog("ethernet: reading from register %u (%s) (raw=0x%x) pc=0x%x ", reg, name, rawaddr, shoe.pc);
}
if (reg == 0) { // command register (exists in all pages)
result = ctx->cr;
goto done;
} else if (ETHPAGE() == 0) { // page 0
switch (reg) {
default:
assert(!"never get here");
goto done;
case 1: // clda0 (current local dma address 0)
goto done;
case 2: // clda1 (current local dma address 1)
goto done;
case 3: // bnry (boundary pointer)
result = ctx->bnry;
goto done;
case 4: // tsr (transmit status)
goto done;
case 5: // ncr (number of collisions)
goto done;
case 6: // fifo
goto done;
case 7: // isr (interrupt status register)
result = ctx->isr;
goto done;
case 8: // crda0 (current remote DMA address 0)
goto done;
case 9: // crda1 (current remote DMA address 1)
goto done;
case 10: // reserved 1
assert("read to reserved 1");
goto done;
case 11: // reserved 2
assert(!"read to reserved 2");
goto done;
case 12: // rsr (receive status register)
goto done;
case 13: // cntr0 (tally counter 0 (frame alignment errors))
goto done;
case 14: // cntr1 (tally counter 1 (crc errors))
goto done;
case 15: // cntr2 (tally counter 2 (missed packet errors))
goto done;
}
} else if (ETHPAGE() == 1) { // page 1
switch (reg) {
default:
assert(!"never get here");
goto done;
case 1: // par (physical address)
case 2:
case 3:
case 4:
case 5:
case 6:
result = ctx->par[reg - 1];
goto done;
case 7: // curr (current page register)
result = ctx->curr;
goto done;
case 8: // mar (multicast address)
case 9:
case 10:
case 11:
case 12:
case 13:
case 14:
case 15:
result = ctx->mar[reg - 8];
goto done;
}
} else
assert(!"read: Somebody accessed page 2 or 3!");
assert(!"never get here");
goto done;
}
case 0xf: { // rom
// Byte lanes = 0101 (respond to shorts)
// respond to (addr & 3 == 0) and (addr & 3 == 2)
// xxxx00 xxxx10
if ((rawaddr & 1) == 0)
result = ctx->rom[(rawaddr >> 1) % 4096];
slog("ethernet: reading from rom addr=%x ", rawaddr);
goto done;
}
default: // Not sure what happens when you access a different addr
assert(!"read: unknown ethernet register");
}
done:
slog("result = 0x%x\n", result);
// slog("ethernet: reading 0x%x sz=%u from addr 0x%x\n", result, size, rawaddr);
return result;
}
void nubus_ethernet_write_func(const uint32_t rawaddr,
const uint32_t size,
const uint32_t data,
const uint8_t slotnum)
{
shoebill_card_ethernet_t *ctx = (shoebill_card_ethernet_t*)shoe.slots[slotnum].ctx;
uint32_t i;
// slog("ethernet: writing 0x%x sz=%u to addr 0x%x\n", data, size, rawaddr);
switch ((rawaddr >> 16) & 0xf) {
case 0xd: { // ram
const uint16_t addr = rawaddr & 0xfff;
uint8_t *ram = ctx->ram;
if (size == 1)
ram[addr] = data;
else if (size == 2) {
ram[addr] = data >> 8;
ram[(addr+1) & 0xfff] = data & 0xff;
}
else
assert(!"write: bogus size");
slog("ethernet: writing 0x%x sz=%u to ram addr 0x%x\n", data, size, addr);
goto done;
}
case 0xe: { // registers
// For some reason, the register address bits are all inverted
const uint8_t reg = 15 ^ ((rawaddr >> 2) & 15);
assert(size == 1);
if (reg == 0) { // command register (exists in all pages)
ctx->cr = data;
goto done;
} else if (ETHPAGE() == 0) { // page 0
{
const char *name = "???";
if (ETHPAGE() == 0) name = eth_w0_reg_names[reg];
else if (ETHPAGE() == 1) name = eth_1_reg_names[reg];
slog("ethernet: writing 0x%02x to register %u (%s) (rawaddr=0x%x) pc=0x%x\n", data, reg, name, rawaddr, shoe.pc);
}
switch (reg) {
default:
assert(!"never get here");
goto done;
case 1: // pstart (page start)
ctx->pstart = data;
goto done;
case 2: // pstop (page stop)
ctx->pstop = data;
goto done;
case 3: // bnry (boundary pointer)
ctx->bnry = data;
goto done;
case 4: // tpsr (transmit page start address)
ctx->tpsr = data;
goto done;
case 5: // tbcr0 (transmit byte count 0)
ctx->tbcr = (ctx->tbcr & 0xff00) | data;
goto done;
case 6: // tbcr1 (transmit byte count 1)
ctx->tbcr = (ctx->tbcr & 0x00ff) | (data<<8);
goto done;
case 7: // isr (interrupt status)
ctx->isr = data;
goto done;
case 8: // rsar0 (remote start address 0)
goto done;
case 9: // rsar1 (remote start address 1)
goto done;
case 10: // rbcr0 (remote byte count 0)
goto done;
case 11: // rbcr1 (remote byte count 1)
goto done;
case 12: // rcr (receive configuration)
ctx->rcr = data;
goto done;
case 13: // tcr (transmit configuration)
ctx->tcr = data;
goto done;
case 14: // dcr (data configuration)
ctx->dcr = data;
goto done;
case 15: // imr (interrupt mask)
goto done;
}
} else if (ETHPAGE() == 1) { // page 1
switch (reg) {
default:
assert(!"never get here");
goto done;
case 1: // par (physical address)
case 2:
case 3:
case 4:
case 5:
case 6:
ctx->par[reg - 1] = data;
goto done;
case 7: // curr (current page register)
ctx->curr = data;
goto done;
case 8: // mar (multicast address)
case 9:
case 10:
case 11:
case 12:
case 13:
case 14:
case 15:
ctx->mar[reg - 8] = data;
goto done;
}
} else
assert(!"write: Somebody accessed page 2 or 3!");
assert(!"never get here");
goto done;
}
default:
assert(!"write: unknown ethernet register");
}
done:
return;
}

BIN
core/ethernet_rom/rom.bin Normal file

Binary file not shown.

514
core/ethernet_rom/rom.c Normal file
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@ -0,0 +1,514 @@
uint8_t _ethernet_rom[4096] = {
0x77, 0x6f, 0x6f, 0x66, 0x00, 0x00, 0x00, 0x00,
0x77, 0x6f, 0x6f, 0x66, 0x00, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x0c, 0x80, 0x00, 0x00, 0x64,
0xff, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x14,
0x02, 0x00, 0x00, 0x18, 0x20, 0x00, 0x00, 0x08,
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0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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};

View File

@ -0,0 +1 @@
# File: shoebill_ether.make # Target: shoebill_ether # Sources: shoebill_ether_rom.a OBJECTS = shoebill_ether_rom.a.o shoebill_ether ÄÄ shoebill_ether.make {OBJECTS} Link ¶ {OBJECTS} ¶ -o shoebill_ether shoebill_ether_rom.a.o Ä shoebill_ether.make shoebill_ether_rom.a Asm shoebill_ether_rom.a

View File

@ -0,0 +1 @@
MACHINE MC68020 STRING C PRINT OFF ; What does this do? INCLUDE 'SysErr.a' INCLUDE 'SysEqu.a' INCLUDE 'ROMEqu.a' INCLUDE 'SlotEqu.a' INCLUDE 'TimeEqu.a' INCLUDE 'Traps.a' INCLUDE 'VideoEqu.a' INCLUDE 'QuickEqu.a' PRINT ON VideoDeclROM MAIN WITH VDPageInfo,SlotIntQElement ; EtherAddr is placed here, before sResourceDir and out of the range of the CRC ; check, because I guess it was too difficult to recompute the CRC when they were ; burning EPROMs back in 1986. ; So there's some ugly offset-accounting to make the rom seem (4096-8) bytes long, ; but still access this MAC address. myEtherAddr dc.l 'woof' dc.l 'woof' FormatBlockSize EQU 20 ROMSize EQU 4096 MyBoardID EQU $0008 ; Apple EtherTalk board ID ; ---- sResource directory ---- CategoryBoard EQU 1 CategoryEther EQU 128 sResourceDir OSLstEntry CategoryBoard, sResourceBoard OSLstEntry CategoryEther, sResourceEther DatLstEntry endOfList,0 ; ---- Board sResource ---- sResourceBoard OSLstEntry sRsrcType, boardType OSLstEntry sRsrcName, boardName DatLstEntry boardID, MyBoardID OSLstEntry vendorInfo, myVendorInfo ; No primary or secondary init needed (phew) DatLstEntry endOfList, 0 boardType DC.W CatBoard ; category DC.W TypBoard ; type DC.W 0 ; driver sw ? DC.W 0 ; driver hw ? STRING C boardName DC.L 'Shoebill Phony Ethernet' myVendorInfo OSLstEntry VendorId, myVendorID OSLstEntry RevLevel, myRevLevel OSLstEntry PartNum, myPartNum myVendorID DC.L 'Shoebill' myRevLevel DC.L 'Rev-1' myPartNum DC.L 'Bort' ; ---- Ethernet sResource ---- sResourceEther OSLstEntry sRsrcType, myEtherType OSLstEntry sRsrcName, myEtherName OSLstEntry MinorBaseOS, myMinorBaseOS dc.w $80ff ; 80 -> MAC address, $FFFFxx relative address of the MAC address dc.w -*+2 DatLstEntry endOfList, 0 myEtherType dc.w CatNetwork dc.w TypEtherNet dc.w 0 ; drvrSw, doesn't matter dc.w 1 ; drvrHw, this is DrHw3Com on Apple EtherTalk myEtherName dc.l 'Network_Ethernet_Shoebill' myMinorBaseOS DC.L $D0000 STRING C ; ---- Format block ---- ; Pad to align this structure with the end of the rom ORG ROMSize-FormatBlockSize ; Offset to sResource directory ;OSLstEntry 0,sResourceDir DC.L (sResourceDir-*)**$00FFFFFF DC.L ROMSize-8 DC.L 0 ; CRC goes here DC.B 1 ; Rom revision level DC.B AppleFormat DC.L TestPattern DC.B 0 ; Reserved DC.B $A5 ; Byte lanes 1010 0101 (LSB from CPU's perspective) ENDP END

View File

@ -133,6 +133,9 @@ uint32_t shoebill_install_video_card(shoebill_config_t *config, uint8_t slotnum,
uint32_t shoebill_install_tfb_card(shoebill_config_t *config, uint8_t slotnum);
/* Call this after shoebill_initialize() to add an ethernet card */
uint32_t shoebill_install_ethernet_card(shoebill_config_t *config, uint8_t slotnum, uint8_t ethernet_addr[6]);
/* Get a video frame from a particular video card */
shoebill_video_frame_info_t shoebill_get_video_frame(uint8_t slotnum, _Bool just_params);
@ -593,14 +596,37 @@ typedef struct {
} shoebill_card_tfb_t;
typedef struct {
// Doesn't exist yet
uint8_t rom[4096];
uint8_t ram[4096];
uint8_t ethernet_addr[6];
uint8_t cr; // command register, all pages, read/write
// Page 0 registers
uint8_t isr; // interrupt status register, read/write
uint8_t dcr; // data configuration register (write)
uint8_t tcr; // transmit configuration register (write)
uint8_t rcr; // receive configuration register (write)
uint8_t pstart; // receive buffer start pointer (write)
uint8_t pstop; // receive buffer boundary (write)
uint8_t bnry; // a different kind of receive buffer boundary (read/write)
uint8_t tpsr; // transmit page start pointer (write)
uint16_t tbcr; // transmit buffer count register (write)
// Page 1 registers (read/write)
uint8_t mar[8]; // multicast address
uint8_t par[6]; // physical address
uint8_t curr; // current page
} shoebill_card_ethernet_t;
typedef enum {
card_none = 0, // Empty slot
card_toby_frame_buffer, // Original Macintosh II video card
card_shoebill_video, // Fancy 21st-century Shoebill video card
card_shoebill_ethernet // FIXME: doesn't exist yet
card_shoebill_ethernet // "Register-compatible" Apple EtherTalk card
} card_names_t;
typedef struct {
@ -1024,6 +1050,11 @@ void nubus_video_write_func(const uint32_t rawaddr, const uint32_t size,
shoebill_video_frame_info_t nubus_video_get_frame(shoebill_card_video_t *ctx,
_Bool just_params);
// Apple EtherTalk
void nubus_ethernet_init(void *_ctx, uint8_t slotnum, uint8_t ethernet_addr[6]);
uint32_t nubus_ethernet_read_func(uint32_t, uint32_t, uint8_t);
void nubus_ethernet_write_func(uint32_t, uint32_t, uint32_t, uint8_t);
// Sound (Apple Sound Chip)
void sound_dma_write_raw(uint16_t addr, uint8_t sz, uint32_t data);
uint32_t sound_dma_read_raw(uint16_t addr, uint8_t sz);

View File

@ -10,16 +10,16 @@ int main (int argc, char **argv)
uint32_t i;
if (argc != 3) {
printf("usage ./rom_to_c video_rom.bin video_rom.c\n");
printf("usage ./rom_to_c video|ethernet rom.bin rom.c\n");
return 0;
}
assert(in = fopen(argv[1], "rb"));
assert(out = fopen(argv[2], "w"));
assert(in = fopen(argv[2], "rb"));
assert(out = fopen(argv[3], "w"));
assert(fread(rom, 4096, 1, in) == 1);
fprintf(out, "static uint8_t _video_rom[4096] = {\n\t");
fprintf(out, "static uint8_t _%s_rom[4096] = {\n\t", argv[1]);
for (i=0; i<4095; i++) {
fprintf(out, "0x%02x, ", rom[i]);
if ((i % 8) == 7)

View File

@ -373,6 +373,9 @@ void pram_callback (void *param, const uint8_t addr, const uint8_t byte)
[self createScreenWindow:9 height:height width:width];
uint8_t ethernet_addr[6] = {0x22, 0x33, 0x55, 0x77, 0xbb, 0xdd};
shoebill_install_ethernet_card(&config, 13, ethernet_addr);
shoebill_start();
isRunning = true;