128 lines
3.5 KiB
C
128 lines
3.5 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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*
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* Kernel Argument Parser
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*
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* Parses arguments passed by, ie, a Multiboot bootloader.
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*
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* Part of the ToAruOS Kernel.
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* (C) 2011 Kevin Lange
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*/
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#include <system.h>
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#include <logging.h>
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#include <ata.h>
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/* XXX: This should be moved */
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void ext2_disk_mount(uint32_t offset_sector, uint32_t max_sector);
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int read_partition_map(int device);
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/**
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* Parse the given arguments to the kernel.
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*
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* @param arg A string containing all arguments, separated by spaces.
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*/
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void
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parse_args(
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char * arg /* Arguments */
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) {
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/* Sanity check... */
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if (!arg) { return; }
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char * pch; /* Tokenizer pointer */
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char * save; /* We use the reentrant form of strtok */
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char * argv[1024]; /* Command tokens (space-separated elements) */
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int tokenid = 0; /* argc, basically */
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/* Tokenize the arguments, splitting at spaces */
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pch = strtok_r(arg," ",&save);
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if (!pch) { return; }
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while (pch != NULL) {
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argv[tokenid] = (char *)pch;
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++tokenid;
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pch = strtok_r(NULL," ",&save);
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}
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argv[tokenid] = NULL;
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/* Tokens are now stored in argv. */
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for (int i = 0; i < tokenid; ++i) {
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/* Parse each provided argument */
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char * pch_i;
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char * save_i;
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char * argp[1024];
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int argc = 0;
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pch_i = strtok_r(argv[i],"=",&save_i);
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if (!pch_i) { continue; }
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while (pch_i != NULL) {
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argp[argc] = (char *)pch_i;
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++argc;
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pch_i = strtok_r(NULL,"=,",&save_i);
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}
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argp[argc] = NULL;
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if (!strcmp(argp[0],"vid")) {
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if (argc < 2) { kprintf("vid=?\n"); continue; }
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uint16_t x, y;
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if (argc < 4) {
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x = 1024;
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y = 768;
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} else {
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x = atoi(argp[2]);
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y = atoi(argp[3]);
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debug_print(NOTICE, "Requested display resolution is %dx%d", x, y);
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}
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if (!strcmp(argp[1],"qemu")) {
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/* Bochs / Qemu Video Device */
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graphics_install_bochs(x,y);
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} else if (!strcmp(argp[1],"preset")) {
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graphics_install_preset(x,y);
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} else {
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debug_print(WARNING, "Unrecognized video adapter: %s", argp[1]);
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}
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} else if (!strcmp(argp[0],"hdd")) {
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ide_init(0x1F0);
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if (argc > 1) {
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debug_print(INFO, "Scanning disk...");
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if (read_partition_map(0)) {
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debug_print(ERROR, "Failed to read MBR.");
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continue;
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}
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int partition = atoi(argp[1]);
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debug_print(NOTICE, "Selected partition %d starts at sector %d", partition, mbr.partitions[partition].lba_first_sector);
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ext2_disk_mount(mbr.partitions[partition].lba_first_sector,mbr.partitions[partition].sector_count);
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} else {
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ext2_disk_mount(0, 0);
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}
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} else if (!strcmp(argp[0],"single")) {
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boot_arg = "--single";
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} else if (!strcmp(argp[0],"lite")) {
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boot_arg = "--special";
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} else if (!strcmp(argp[0],"vgaterm")) {
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boot_arg = "--vga";
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} else if (!strcmp(argp[0],"start")) {
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if (argc < 2) {
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debug_print(WARNING, "Expected an argument to kernel option `start`. Ignoring.");
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continue;
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}
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boot_arg_extra = argp[1];
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} else if (!strcmp(argp[0],"logtoserial")) {
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if (argc > 1) {
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debug_level = atoi(argp[1]);
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} else {
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debug_level = NOTICE; /* INFO is a bit verbose for a default */
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}
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kprint_to_serial = 1;
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debug_print(NOTICE, "Kernel serial logging enabled at level %d.", debug_level);
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} else if (!strcmp(argp[0],"kernel-term")) {
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if (argc > 1) {
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debug_level = atoi(argp[1]);
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} else {
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debug_level = NOTICE; /* INFO is a bit verbose for a default */
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}
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kprint_to_screen = 1;
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debug_print(NOTICE, "Kernel serial logging enabled at level %d.", debug_level);
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} else if (!strcmp(argp[0],"read-mbr")) {
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read_partition_map(0);
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}
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}
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}
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