mirror of
https://github.com/isometimes/rpi4-osdev
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First ARP implementation ready for testing
This commit is contained in:
Adam Greenwood-Byrne
parent
5abfeb9e30
commit
befc45feba
12 changed files with 295 additions and 67 deletions
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@ -2,7 +2,7 @@ CFILES = $(wildcard *.c lib/*.c kernel/*.c net/*.c)
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SFILES = $(wildcard boot/*.S lib/*.S kernel/*.S)
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OFILES = $(CFILES:.c=.o) $(SFILES:.S=.o)
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LLVMPATH = /opt/homebrew/opt/llvm/bin
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CLANGFLAGS = -Wall -O2 -ffreestanding -nostdlib -mcpu=cortex-a72+nosimd
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CLANGFLAGS = -Wall -O0 -ffreestanding -nostdlib -mcpu=cortex-a72+nosimd
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all: clean kernel8.img
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@ -1,7 +1,7 @@
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CFILES = $(wildcard *.c lib/*.c kernel/*.c net/*.c)
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SFILES = $(wildcard boot/*.S lib/*.S kernel/*.S)
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OFILES = $(CFILES:.c=.o) $(SFILES:.S=.o)
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GCCFLAGS = -Wall -O2 -ffreestanding -nostdlib -nostartfiles
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GCCFLAGS = -Wall -O0 -ffreestanding -nostdlib -nostartfiles
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GCCPATH = ../../gcc-arm-10.3-2021.07-x86_64-aarch64-none-elf/bin
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all: clean kernel8.img
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@ -1,5 +1,5 @@
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void spi_init();
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void spi_send_recv(unsigned char *sbuffer, unsigned char *rbuffer, unsigned int size);
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unsigned int spi_send_recv(unsigned char *sbuffer, unsigned char *rbuffer, unsigned int size);
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void spi_send(unsigned char *data, unsigned int size);
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void spi_recv(unsigned char *data, unsigned int size);
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void spi_send_no_selection(unsigned char command);
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201
part14-ethernet/kernel/arp.c
Normal file
201
part14-ethernet/kernel/arp.c
Normal file
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@ -0,0 +1,201 @@
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#include "../net/enc28j60.h"
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#include "../include/fb.h"
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// Structure for Ethernet header
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typedef struct {
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uint8_t DestAddrs[6];
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uint8_t SrcAddrs[6];
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uint16_t type;
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} EtherNetII;
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// Ethernet packet types
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#define ARPPACKET 0x0806
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#define IPPACKET 0x0800
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// Structure for an ARP Packet
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typedef struct {
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EtherNetII eth;
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uint16_t hardware;
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uint16_t protocol;
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uint8_t hardwareSize;
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uint8_t protocolSize;
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uint16_t opCode;
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uint8_t senderMAC[6];
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uint8_t senderIP[4];
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uint8_t targetMAC[6];
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uint8_t targetIP[4];
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} ARP;
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// ARP OpCodes
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#define ARPREPLY 0x0002
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#define ARPREQUEST 0x0001
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// ARP hardware types
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#define ETHERNET 0x0001
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// MAC address to be assigned to the ENC28J60
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uint8_t myMAC[6] = { 0xc0, 0xff, 0xee, 0xc0, 0xff, 0xee };
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// Router MAC is not known to start with, and requires an ARP reply to find out
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uint8_t routerMAC[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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// IP address to be assigned to the ENC28J60
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uint8_t deviceIP[4] = { 192, 168, 0, 66 };
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// IP Address of the router, whose hardware address we will find using the ARP request
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uint8_t routerIP[4] = { 192, 168, 0, 1 };
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// HELPER FUNCTIONS
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void *memset(void *dest, uint8_t val, uint16_t len)
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{
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uint8_t *ptr = dest;
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while (len-- > 0)
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*ptr++ = val;
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return dest;
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}
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void *memcpy(void *dest, const void *src, uint16_t len)
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{
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uint8_t *d = dest;
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const uint8_t *s = src;
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while (len--)
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*d++ = *s++;
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return dest;
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}
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uint8_t memcmp(void *str1, void *str2, unsigned count)
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{
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uint8_t *s1 = str1;
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uint8_t *s2 = str2;
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while (count-- > 0)
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{
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if (*s1++ != *s2++)
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return s1[-1] < s2[-1] ? -1 : 1;
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}
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return 0;
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}
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// MAIN FUNCTIONS
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void SendArpPacket(uint8_t *targetIP, uint8_t *deviceMAC)
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{
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/* Parameters:
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* targetIP - The target IP Address for the ARP request (the one whose hardware
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* address we want)
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* deviceMAC - The MAC address of the ENC28J60, i.e. the source MAC for the ARP
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* request
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*/
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ARP arpPacket;
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// The source of the packet will be the ENC28J60 MAC address
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memcpy(arpPacket.eth.SrcAddrs, deviceMAC, 6);
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// The destination is broadcast - a MAC address of FF:FF:FF:FF:FF:FF */
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memset(arpPacket.eth.DestAddrs, 0xFF, 6);
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arpPacket.eth.type = ARPPACKET;
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arpPacket.hardware = ETHERNET;
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// We want an IP address resolved
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arpPacket.protocol = IPPACKET;
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arpPacket.hardwareSize = 0x06; // sizeof(deviceMAC);
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arpPacket.protocolSize = 0x04; // sizeof(deviceIP);
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arpPacket.opCode = ARPREQUEST;
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// Target MAC is set to 0 as it is unknown
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memset(arpPacket.targetMAC, 0, 6);
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// Sender MAC is the ENC28J60's MAC address
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memcpy(arpPacket.senderMAC, deviceMAC, 6);
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// The target IP is the IP address we want resolved
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memcpy(arpPacket.targetIP, targetIP, 4);
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// Check if the last reply has come from an IP address that we want i.e. someone else is already using it
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if (!memcmp(targetIP, deviceIP, 4)) {
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// Yes, someone is using our IP so set the sender IP to 0.0.0.0
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memset(arpPacket.senderIP, 0, 4);
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} else {
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// No, nobody is using our IP so we can use it confidently
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memcpy(arpPacket.senderIP, deviceIP, 4);
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}
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// Send the packet
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ENC_WriteBuffer((unsigned char*)&arpPacket, sizeof(ARP));
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}
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void arp_test(void)
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{
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unsigned int tries = 0;
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ARP checkPacket;
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debugstr("Sending ARP request... ");
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SendArpPacket(routerIP, myMAC);
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debugstr("done.");
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debugcrlf();
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debugstr("Waiting for ARP response... ");
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debugcrlf();
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while (tries < 1000) {
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if (ENC_ReadBuffer((unsigned char *)&checkPacket, sizeof(ARP)) == 0) {
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continue;
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}
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if (!memcmp(checkPacket.senderIP, routerIP, 4)) {
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// Success! We have found our router's MAC address
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memcpy(routerMAC, checkPacket.senderMAC, 6);
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debugstr("Router MAC is ");
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debughex(routerMAC[0]);
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debughex(routerMAC[1]);
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debughex(routerMAC[2]);
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debughex(routerMAC[3]);
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debughex(routerMAC[4]);
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debughex(routerMAC[5]);
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debugcrlf();
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}
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tries++;
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}
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debugstr("Timed out.");
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debugcrlf();
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}
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void init_network(void)
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{
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ENC_HandleTypeDef handle;
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debugstr("Setting MAC address to C0:FF:EE:C0:FF:EE.");
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debugcrlf();
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handle.Init.DuplexMode = ETH_MODE_FULLDUPLEX;
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handle.Init.MACAddr = myMAC;
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handle.Init.ChecksumMode = ETH_CHECKSUM_BY_HARDWARE;
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handle.Init.InterruptEnableBits = 0;
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debugstr("Starting network up.");
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debugcrlf();
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if (!ENC_Start(&handle)) {
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debugstr("Could not initialise network card.");
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} else {
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debugstr("Network card successfully initialised.");
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}
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debugcrlf();
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}
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@ -1,4 +1,27 @@
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#include "kernel.h"
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#include "../include/fb.h"
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char *entry_error_messages[] = {
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"SYNC_INVALID_EL1t",
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"IRQ_INVALID_EL1t",
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"FIQ_INVALID_EL1t",
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"ERROR_INVALID_EL1T",
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"SYNC_INVALID_EL1h",
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"IRQ_INVALID_EL1h",
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"FIQ_INVALID_EL1h",
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"ERROR_INVALID_EL1h",
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"SYNC_INVALID_EL0_64",
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"IRQ_INVALID_EL0_64",
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"FIQ_INVALID_EL0_64",
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"ERROR_INVALID_EL0_64",
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"SYNC_INVALID_EL0_32",
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"IRQ_INVALID_EL0_32",
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"FIQ_INVALID_EL0_32",
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"ERROR_INVALID_EL0_32"
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};
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void enable_interrupt_controller() {
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REGS_IRQ->irq0_enable_0 = SYS_TIMER_IRQ_1 | SYS_TIMER_IRQ_3;
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@ -8,6 +31,14 @@ void disable_interrupt_controller() {
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REGS_IRQ->irq0_enable_0 = 0;
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}
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void show_invalid_entry_message(int type, unsigned long esr, unsigned long address) {
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debugstr(entry_error_messages[type]);
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debugstr(" ESR: ");
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debughex(esr);
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debugstr("Addr: ");
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debughex(address);
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}
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void handle_irq() {
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unsigned int irq = REGS_IRQ->irq0_pending_0;
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@ -67,11 +67,7 @@
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mov x0, #\type
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mrs x1, esr_el1
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mrs x2, elr_el1
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// We could pass this to a function to print an error here
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// e.g. bl show_invalid_entry_message
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//
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// For now we'll just hang
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bl show_invalid_entry_message
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b err_hang
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.endm
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@ -8,10 +8,10 @@
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void initProgress(void)
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{
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drawRect(0, 0, 301, 50, 0x0f, 0);
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drawString(309, 21, "Core 0", 0x0f, 1);
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drawString(309, 21, "Core 1", 0x0f, 1);
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drawRect(0, 60, 301, 110, 0x0f, 0);
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drawString(309, 81, "Core 1", 0x0f, 1);
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drawString(309, 81, "Core 2", 0x0f, 1);
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drawRect(0, 120, 301, 170, 0x0f, 0);
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drawString(309, 141, "Timer 1", 0x0f, 1);
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@ -28,21 +28,24 @@ void drawProgress(unsigned int core, unsigned int val) {
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if (val > 0) drawRect(1, (60 * core) + 1, (val * 3), (60 * core) + 49, col, 1);
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}
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void core0_main(void)
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{
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unsigned int core0_val = 0;
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unsigned int c2_done = 0;
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while (core0_val <= 100) {
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void core2_main(void)
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{
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unsigned int core2_val = 0;
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clear_core2(); // Only run once
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while (core2_val <= 100) {
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wait_msec(0x100000);
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drawProgress(0, core0_val);
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core0_val++;
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drawProgress(1, core2_val);
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core2_val++;
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}
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debugstr("Core 0 done.");
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debugstr("Core 2 done.");
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debugcrlf();
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irq_disable();
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disable_interrupt_controller();
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c2_done = 1;
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while(1);
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}
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@ -55,7 +58,7 @@ void core1_main(void)
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while (core1_val <= 100) {
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wait_msec(0x3FFFF);
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drawProgress(1, core1_val);
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drawProgress(0, core1_val);
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core1_val++;
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}
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@ -132,37 +135,6 @@ unsigned int HAL_GetTick(void) {
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return timer_get_ticks();
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}
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void init_network(void)
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{
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ENC_HandleTypeDef handle;
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unsigned char macaddr[6];
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macaddr[0] = 0xc0;
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macaddr[1] = 0xff;
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macaddr[2] = 0xee;
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macaddr[3] = 0xc0;
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macaddr[4] = 0xff;
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macaddr[5] = 0xee;
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debugstr("Setting MAC address to C0:FF:EE:C0:FF:EE.");
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debugcrlf();
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handle.Init.DuplexMode = ETH_MODE_FULLDUPLEX;
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handle.Init.MACAddr = macaddr;
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handle.Init.ChecksumMode = ETH_CHECKSUM_BY_HARDWARE;
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handle.Init.InterruptEnableBits = 0;
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debugstr("Starting network up.");
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debugcrlf();
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if (!ENC_Start(&handle)) {
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debugstr("Could not initialise network card.");
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} else {
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debugstr("Network card successfully initialised.");
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}
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debugcrlf();
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}
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void main(void)
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{
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fb_init();
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@ -172,20 +144,35 @@ void main(void)
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initProgress();
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// Kick it off on core 1&2
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start_core1(core1_main);
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start_core2(core2_main);
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// Kick off the timers
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irq_init_vectors();
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enable_interrupt_controller();
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irq_enable();
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timer_init();
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// Test the network card
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spi_init();
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init_network();
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arp_test();
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// Kick it off on core 1
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// The work is done - wait for timers to get done
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start_core1(core1_main);
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debugstr("Core 0 done.");
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debugcrlf();
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// Loop endlessly
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while (!c2_done);
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core0_main();
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// Disable IRQs and loop endlessly
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irq_disable();
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disable_interrupt_controller();
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while(1);
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}
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@ -49,3 +49,6 @@ unsigned long timer_get_ticks();
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void timer_sleep(unsigned int ms);
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void HAL_Delay(volatile unsigned int Delay);
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unsigned int HAL_GetTick(void);
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void init_network(void);
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void arp_test(void);
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@ -52,7 +52,7 @@ void spi_chip_select(unsigned char chip_select) {
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REGS_SPI0->cs = (REGS_SPI0->cs & ~CS_CS) | (chip_select << CS_CS__SHIFT);
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}
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void spi_send_recv(unsigned char *sbuffer, unsigned char *rbuffer, unsigned int size) {
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unsigned int spi_send_recv(unsigned char *sbuffer, unsigned char *rbuffer, unsigned int size) {
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REGS_SPI0->data_length = size;
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REGS_SPI0->cs = REGS_SPI0->cs | CS_CLEAR_RX | CS_CLEAR_TX | CS_TA;
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@ -89,6 +89,7 @@ void spi_send_recv(unsigned char *sbuffer, unsigned char *rbuffer, unsigned int
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}
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REGS_SPI0->cs = (REGS_SPI0->cs & ~CS_TA);
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return read_count;
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}
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void spi_send(unsigned char *data, unsigned int size) {
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@ -993,7 +993,7 @@ void ENC_WriteBuffer(void *buffer, uint16_t buflen)
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}
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/****************************************************************************
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* Function: enc_rdbuffer
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* Function: ENC_ReadBuffer
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*
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* Description:
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* Read a buffer of data.
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@ -1003,15 +1003,17 @@ void ENC_WriteBuffer(void *buffer, uint16_t buflen)
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* buflen - The number of bytes to read
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*
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* Returned Value:
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* None
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* read_count - Number of bytes received
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*
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* Assumptions:
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* Read pointer is set to the correct address
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*
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****************************************************************************/
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static void enc_rdbuffer(void *buffer, int16_t buflen)
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uint8_t ENC_ReadBuffer(void *buffer, uint16_t buflen)
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{
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uint8_t read_count = 0;
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/* Select ENC28J60 chip */
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ENC_SPI_Select(true);
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@ -1022,9 +1024,11 @@ static void enc_rdbuffer(void *buffer, int16_t buflen)
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/* Then read the buffer data */
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ENC_SPI_SendBuf(NULL, buffer, buflen);
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read_count = ENC_SPI_SendBuf(NULL, buffer, buflen);
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/* De-select ENC28J60 chip: done in ENC_SPI_SendBuf callback */
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return read_count;
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}
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/****************************************************************************
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||||
|
|
@ -1187,7 +1191,7 @@ void ENC_Transmit(ENC_HandleTypeDef *handle)
|
|||
enc_wrbreg(handle, ENC_ERDPTL, addtTsv4 & 0xff);
|
||||
enc_wrbreg(handle, ENC_ERDPTH, addtTsv4 >> 8);
|
||||
|
||||
enc_rdbuffer(&tsv4, 1);
|
||||
ENC_ReadBuffer(&tsv4, 1);
|
||||
regval = enc_rdgreg(ENC_EIR);
|
||||
if (!(regval & EIR_TXERIF) || !(tsv4 & TSV_LATECOL)) {
|
||||
break;
|
||||
|
|
@ -1242,7 +1246,7 @@ bool ENC_GetReceivedFrame(ENC_HandleTypeDef *handle)
|
|||
* and wrap to the beginning of the read buffer as necessary)
|
||||
*/
|
||||
|
||||
enc_rdbuffer(rsv, 6);
|
||||
ENC_ReadBuffer(rsv, 6);
|
||||
|
||||
/* Decode the new next packet pointer, and the RSV. The
|
||||
* RSV is encoded as:
|
||||
|
|
@ -1281,7 +1285,7 @@ bool ENC_GetReceivedFrame(ENC_HandleTypeDef *handle)
|
|||
* end_rdbuffer (above).
|
||||
*/
|
||||
|
||||
enc_rdbuffer(handle->RxFrameInfos.buffer, handle->RxFrameInfos.length);
|
||||
ENC_ReadBuffer(handle->RxFrameInfos.buffer, handle->RxFrameInfos.length);
|
||||
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -98,10 +98,10 @@ void ENC_SPI_Send(uint8_t command);
|
|||
* Implement SPI buffer send and receive. Must be provided by user code
|
||||
* param master2slave: data to be sent from host to ENC28J60, can be NULL if we only want to receive data from slave
|
||||
* param slave2master: answer from ENC28J60 to host, can be NULL if we only want to send data to slave
|
||||
* retval none
|
||||
* retval read_count: number of bytes read (if applicable)
|
||||
*/
|
||||
|
||||
void ENC_SPI_SendBuf(uint8_t *master2slave, uint8_t *slave2master, uint16_t bufferSize);
|
||||
unsigned int ENC_SPI_SendBuf(uint8_t *master2slave, uint8_t *slave2master, uint16_t bufferSize);
|
||||
|
||||
/* Exported types ------------------------------------------------------------*/
|
||||
/** @defgroup ETH_Exported_Types ETH Exported Types
|
||||
|
|
@ -686,6 +686,7 @@ int8_t ENC_RestoreTXBuffer(ENC_HandleTypeDef *handle, uint16_t len);
|
|||
****************************************************************************/
|
||||
|
||||
void ENC_WriteBuffer(void *buffer, uint16_t buflen);
|
||||
uint8_t ENC_ReadBuffer(void *buffer, uint16_t buflen);
|
||||
|
||||
/****************************************************************************
|
||||
* Function: ENC_Transmit
|
||||
|
|
|
|||
|
|
@ -4,10 +4,14 @@ void ENC_SPI_Select(unsigned char truefalse) {
|
|||
spi_chip_select(!truefalse); // If it's true, select 0 (the ENC), if false, select 1 (i.e. deselect the ENC)
|
||||
}
|
||||
|
||||
void ENC_SPI_SendBuf(unsigned char *master2slave, unsigned char *slave2master, unsigned short bufferSize) {
|
||||
unsigned int ENC_SPI_SendBuf(unsigned char *master2slave, unsigned char *slave2master, unsigned short bufferSize) {
|
||||
unsigned int read_count = 0;
|
||||
|
||||
spi_chip_select(0);
|
||||
spi_send_recv(master2slave, slave2master, bufferSize);
|
||||
read_count = spi_send_recv(master2slave, slave2master, bufferSize);
|
||||
spi_chip_select(1); // De-select the ENC
|
||||
|
||||
return read_count;
|
||||
}
|
||||
|
||||
void ENC_SPI_Send(unsigned char command) {
|
||||
|
|
|
|||
Loading…
Reference in a new issue