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path: root/pc-bios/s390-ccw/netmain.c
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Diffstat (limited to 'pc-bios/s390-ccw/netmain.c')
-rw-r--r--pc-bios/s390-ccw/netmain.c168
1 files changed, 139 insertions, 29 deletions
diff --git a/pc-bios/s390-ccw/netmain.c b/pc-bios/s390-ccw/netmain.c
index d86d46b03f..600024155b 100644
--- a/pc-bios/s390-ccw/netmain.c
+++ b/pc-bios/s390-ccw/netmain.c
@@ -39,8 +39,12 @@
extern char _start[];
+#define KERNEL_ADDR ((void *)0L)
+#define KERNEL_MAX_SIZE ((long)_start)
+
char stack[PAGE_SIZE * 8] __attribute__((aligned(PAGE_SIZE)));
IplParameterBlock iplb __attribute__((aligned(PAGE_SIZE)));
+static char cfgbuf[2048];
static SubChannelId net_schid = { .one = 1 };
static int ip_version = 4;
@@ -128,17 +132,23 @@ static void seed_rng(uint8_t mac[])
srand(seed);
}
-static int tftp_load(filename_ip_t *fnip, void *buffer, int len,
- unsigned int retries, int ip_vers)
+static int tftp_load(filename_ip_t *fnip, void *buffer, int len)
{
tftp_err_t tftp_err;
int rc;
- rc = tftp(fnip, buffer, len, retries, &tftp_err, 1, 1428, ip_vers);
+ rc = tftp(fnip, buffer, len, DEFAULT_TFTP_RETRIES, &tftp_err, 1, 1428,
+ ip_version);
- if (rc > 0) {
- printf(" TFTP: Received %s (%d KBytes)\n", fnip->filename,
- rc / 1024);
+ if (rc < 0) {
+ /* Make sure that error messages are put into a new line */
+ printf("\n ");
+ }
+
+ if (rc > 1024) {
+ printf(" TFTP: Received %s (%d KBytes)\n", fnip->filename, rc / 1024);
+ } else if (rc > 0) {
+ printf(" TFTP: Received %s (%d Bytes)\n", fnip->filename, rc);
} else if (rc == -1) {
puts("unknown TFTP error");
} else if (rc == -2) {
@@ -199,20 +209,19 @@ static int tftp_load(filename_ip_t *fnip, void *buffer, int len,
return rc;
}
-static int net_load(char *buffer, int len)
+static int net_init(filename_ip_t *fn_ip)
{
- filename_ip_t fn_ip;
uint8_t mac[6];
int rc;
- memset(&fn_ip, 0, sizeof(filename_ip_t));
+ memset(fn_ip, 0, sizeof(filename_ip_t));
rc = virtio_net_init(mac);
if (rc < 0) {
puts("Could not initialize network device");
return -101;
}
- fn_ip.fd = rc;
+ fn_ip->fd = rc;
printf(" Using MAC address: %02x:%02x:%02x:%02x:%02x:%02x\n",
mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
@@ -220,10 +229,10 @@ static int net_load(char *buffer, int len)
set_mac_address(mac); /* init ethernet layer */
seed_rng(mac);
- rc = dhcp(&fn_ip, DEFAULT_BOOT_RETRIES);
+ rc = dhcp(fn_ip, DEFAULT_BOOT_RETRIES);
if (rc >= 0) {
if (ip_version == 4) {
- set_ipv4_address(fn_ip.own_ip);
+ set_ipv4_address(fn_ip->own_ip);
}
} else {
puts("Could not get IP address");
@@ -232,18 +241,18 @@ static int net_load(char *buffer, int len)
if (ip_version == 4) {
printf(" Using IPv4 address: %d.%d.%d.%d\n",
- (fn_ip.own_ip >> 24) & 0xFF, (fn_ip.own_ip >> 16) & 0xFF,
- (fn_ip.own_ip >> 8) & 0xFF, fn_ip.own_ip & 0xFF);
+ (fn_ip->own_ip >> 24) & 0xFF, (fn_ip->own_ip >> 16) & 0xFF,
+ (fn_ip->own_ip >> 8) & 0xFF, fn_ip->own_ip & 0xFF);
} else if (ip_version == 6) {
char ip6_str[40];
- ipv6_to_str(fn_ip.own_ip6.addr, ip6_str);
+ ipv6_to_str(fn_ip->own_ip6.addr, ip6_str);
printf(" Using IPv6 address: %s\n", ip6_str);
}
if (rc == -2) {
printf("ARP request to TFTP server (%d.%d.%d.%d) failed\n",
- (fn_ip.server_ip >> 24) & 0xFF, (fn_ip.server_ip >> 16) & 0xFF,
- (fn_ip.server_ip >> 8) & 0xFF, fn_ip.server_ip & 0xFF);
+ (fn_ip->server_ip >> 24) & 0xFF, (fn_ip->server_ip >> 16) & 0xFF,
+ (fn_ip->server_ip >> 8) & 0xFF, fn_ip->server_ip & 0xFF);
return -102;
}
if (rc == -4 || rc == -3) {
@@ -251,28 +260,108 @@ static int net_load(char *buffer, int len)
return -107;
}
+ printf(" Using TFTP server: ");
if (ip_version == 4) {
- printf(" Requesting file \"%s\" via TFTP from %d.%d.%d.%d\n",
- fn_ip.filename,
- (fn_ip.server_ip >> 24) & 0xFF, (fn_ip.server_ip >> 16) & 0xFF,
- (fn_ip.server_ip >> 8) & 0xFF, fn_ip.server_ip & 0xFF);
+ printf("%d.%d.%d.%d\n",
+ (fn_ip->server_ip >> 24) & 0xFF, (fn_ip->server_ip >> 16) & 0xFF,
+ (fn_ip->server_ip >> 8) & 0xFF, fn_ip->server_ip & 0xFF);
} else if (ip_version == 6) {
char ip6_str[40];
- printf(" Requesting file \"%s\" via TFTP from ", fn_ip.filename);
- ipv6_to_str(fn_ip.server_ip6.addr, ip6_str);
+ ipv6_to_str(fn_ip->server_ip6.addr, ip6_str);
printf("%s\n", ip6_str);
}
- /* Do the TFTP load and print error message if necessary */
- rc = tftp_load(&fn_ip, buffer, len, DEFAULT_TFTP_RETRIES, ip_version);
+ if (strlen((char *)fn_ip->filename) > 0) {
+ printf(" Bootfile name: '%s'\n", fn_ip->filename);
+ }
+ return rc;
+}
+
+static void net_release(filename_ip_t *fn_ip)
+{
if (ip_version == 4) {
- dhcp_send_release(fn_ip.fd);
+ dhcp_send_release(fn_ip->fd);
+ }
+}
+
+/**
+ * Load via information from a .INS file (which can be found on CD-ROMs
+ * for example)
+ */
+static int handle_ins_cfg(filename_ip_t *fn_ip, char *cfg, int cfgsize)
+{
+ char *ptr;
+ int rc = -1, llen;
+ void *destaddr;
+ char *insbuf = cfg;
+
+ ptr = strchr(insbuf, '\n');
+ if (!ptr) {
+ puts("Does not seem to be a valid .INS file");
+ return -1;
+ }
+
+ *ptr = 0;
+ printf("\nParsing .INS file:\n %s\n", &insbuf[2]);
+
+ insbuf = ptr + 1;
+ while (*insbuf && insbuf < cfg + cfgsize) {
+ ptr = strchr(insbuf, '\n');
+ if (ptr) {
+ *ptr = 0;
+ }
+ llen = strlen(insbuf);
+ if (!llen) {
+ insbuf = ptr + 1;
+ continue;
+ }
+ ptr = strchr(insbuf, ' ');
+ if (!ptr) {
+ puts("Missing space separator in .INS file");
+ return -1;
+ }
+ *ptr = 0;
+ strncpy((char *)fn_ip->filename, insbuf, sizeof(fn_ip->filename));
+ destaddr = (char *)atol(ptr + 1);
+ rc = tftp_load(fn_ip, destaddr, (long)_start - (long)destaddr);
+ if (rc <= 0) {
+ break;
+ }
+ insbuf += llen + 1;
}
return rc;
}
+static int net_try_direct_tftp_load(filename_ip_t *fn_ip)
+{
+ int rc;
+ void *loadaddr = (void *)0x2000; /* Load right after the low-core */
+
+ rc = tftp_load(fn_ip, loadaddr, KERNEL_MAX_SIZE - (long)loadaddr);
+ if (rc < 0) {
+ return rc;
+ } else if (rc < 8) {
+ printf("'%s' is too small (%i bytes only).\n", fn_ip->filename, rc);
+ return -1;
+ }
+
+ /* Check whether it is a configuration file instead of a kernel */
+ if (rc < sizeof(cfgbuf) - 1) {
+ memcpy(cfgbuf, loadaddr, rc);
+ cfgbuf[rc] = 0; /* Make sure that it is NUL-terminated */
+ if (!strncmp("* ", cfgbuf, 2)) {
+ return handle_ins_cfg(fn_ip, cfgbuf, rc);
+ }
+ }
+
+ /* Move kernel to right location */
+ memmove(KERNEL_ADDR, loadaddr, rc);
+
+ return rc;
+}
+
void panic(const char *string)
{
sclp_print(string);
@@ -281,6 +370,15 @@ void panic(const char *string)
}
}
+void write_subsystem_identification(void)
+{
+ SubChannelId *schid = (SubChannelId *) 184;
+ uint32_t *zeroes = (uint32_t *) 188;
+
+ *schid = net_schid;
+ *zeroes = 0;
+}
+
static bool find_net_dev(Schib *schib, int dev_no)
{
int i, r;
@@ -344,17 +442,29 @@ static void virtio_setup(void)
void main(void)
{
- int rc;
+ filename_ip_t fn_ip;
+ int rc, fnlen;
sclp_setup();
sclp_print("Network boot starting...\n");
virtio_setup();
- rc = net_load(NULL, (long)_start);
+ rc = net_init(&fn_ip);
+ if (rc) {
+ panic("Network initialization failed. Halting.\n");
+ }
+
+ fnlen = strlen((char *)fn_ip.filename);
+ if (fnlen > 0 && fn_ip.filename[fnlen - 1] != '/') {
+ rc = net_try_direct_tftp_load(&fn_ip);
+ }
+
+ net_release(&fn_ip);
+
if (rc > 0) {
sclp_print("Network loading done, starting kernel...\n");
- asm volatile (" lpsw 0(%0) " : : "r"(0) : "memory");
+ jump_to_low_kernel();
}
panic("Failed to load OS from network\n");
generated by cgit v1.2.1 (git 2.18.0) at 2024-06-26 22:45:13 +0000