diff options
Diffstat (limited to 'kernel.c')
| -rw-r--r-- | kernel.c | 138 |
1 files changed, 109 insertions, 29 deletions
@@ -16,48 +16,128 @@ * */ -// Complain if some pleb's not using a cross-compiler +// Complain if some pleb's using a linux toolchain and not cross-compiling #if defined(__linux__) #error "You're not using a cross-compiler. Good luck with that." #endif #include <toast.h> -void kernel_main(multiboot_info_t *mbd, unsigned int magic) +// vv-- Put me somewhere --vv +uint32_t TOTAL_MEMORY = 0; // Total memory. Typically set by k_tally_available_memory(). + // It must be initialised to 0 so that if it's not set otherwise, nothing will think there's memory available +bool KERNEL_OPTION_QUIET = FALSE; +bool KERNEL_OPTION_SILENT = FALSE; +bool KERNEL_OPTION_ESHELL = FALSE; +// ^^-- put me somewhere --^ + +void kernel_main(multiboot_info_t *mbd, uint32_t magic) { + //********************************************************* + // First things first. Parse the command line. Quick guide: + // + // o quiet - Don't print so much stuff to the screen during boot + // o silent - Don't print anything at all during boot (implies quiet) + // o eshell - (RESERVED) Will be used to enter emergency shell + // + if (string_contains( (char*)(mbd->cmdline) , "quiet")) + KERNEL_OPTION_QUIET = TRUE; + + if (string_contains( (char*)(mbd->cmdline) , "silent")) + { + KERNEL_OPTION_QUIET = TRUE; + KERNEL_OPTION_SILENT = TRUE; + } + if (string_contains( (char*)(mbd->cmdline) , "eshell")) + KERNEL_OPTION_ESHELL = TRUE; + //********************************************************* + + //********************************************************* + // Do some important things before we forget + k_tally_available_memory(mbd); + + // Init the text console and colours console_init(); - console_set_colors(COLOR_BRIGHT_GRAY,COLOR_BLACK); + console_set_colors(COLOR_BRIGHT_GRAY, COLOR_BLACK); + console_swap_colors(); + console_set_colors(COLOR_BRIGHT_GRAY, COLOR_BLACK); console_clear(); - console_print("Welcome to Toast v%d.%d (nickname '%s')\n",KERNEL_VERSION_MAJ,KERNEL_VERSION_MIN,KERNEL_NICKNAME); - console_set_color(COLOR_RED); - - // Print some stuff about the bootload - console_print("Here is kernel_main()\n"); - console_print("Bootloader: %s\n",mbd->boot_loader_name); - console_print("BIOS Memory: %d Bytes\n",mbd->mem_upper - mbd->mem_lower);// find out 100% what this is - console_print("Kernel: %s\n",mbd->cmdline); - console_print("Flags: %b\n",mbd->flags); - console_print("Boot Device: %x\n",mbd->boot_device); - - console_print("--------------------------------\nShowing console_print() off...\n%dd in binary is %b\n%oo = %xh = %dd\n%d is the ASCII code for %c\n--------------------------------\n",100,100,1234,1234,1234,112,112); - - console_print("strlen(\"asdf\") == %d\n",strlen("asdf")); - console_print("strlen(\"\") == %d\n",strlen("")); - // Show all memory stuff - uint32_t mmaps = mbd->mmap_length; - - multiboot_memory_map_t* mmap = mbd->mmap_addr; - while(mmap < mbd->mmap_addr + mbd->mmap_length) + //********************************************************* + + if (!KERNEL_OPTION_QUIET) + { + // Print some stuff about the environment + console_print("Here is kernel_main()\n"); + console_print("Bootloader: %s\n",mbd->boot_loader_name); + console_print("Kernel: %s\n",mbd->cmdline); + console_print("Flags: %b\n",mbd->flags); + console_print("Boot Device: %x\n",mbd->boot_device); + + // Dump some info about the memory blocks/regions available/reserved + k_dump_memory_blocks(mbd); + } + if (!KERNEL_OPTION_SILENT) + { + console_print("Welcome to Toast v%d.%d (nickname '%s')\nMemory: %dMiB", + KERNEL_VERSION_MAJ, + KERNEL_VERSION_MIN, + KERNEL_NICKNAME, + TOTAL_MEMORY/1048576); + } + //panic(0x4655434B); // (TEST) testing panic +} + +/********************************************************* + * Tally/total the amount of available memory and store + * it for later use. Returns pointer to total mem figure + ********************************************************/ +uint32_t *k_tally_available_memory(multiboot_info_t *mbd) +{ + multiboot_memory_map_t* mmap = (multiboot_memory_map_t*)mbd->mmap_addr; + TOTAL_MEMORY = 0; + + while((uint32_t)mmap < mbd->mmap_addr + mbd->mmap_length) + { + mmap = (multiboot_memory_map_t*)( (uint32_t)mmap + mmap->size + sizeof(uint32_t) ); + + if (mmap->type == 1) // available + TOTAL_MEMORY += (uint32_t)mmap->len; + } + return &TOTAL_MEMORY; +} + +/********************************************************* + * Dump information about the blocks of memory. What + * starts and finishes where and available/reserved + ********************************************************/ +void k_dump_memory_blocks(multiboot_info_t *mbd) +{ + multiboot_memory_map_t* mmap = (multiboot_memory_map_t*)mbd->mmap_addr; + + // While we're pointing to a mem map struct within the supplied range... + while((uint32_t)mmap < mbd->mmap_addr + mbd->mmap_length) { - mmap = (multiboot_memory_map_t*) ( (unsigned int)mmap + mmap->size + sizeof(unsigned int) ); - console_print("%s: 0x%x to 0x%x = %d bytes\n", - mmap->type == 1? "AVAILABLE" : "RESERVED ", + mmap = (multiboot_memory_map_t*)( (uint32_t)mmap + mmap->size + sizeof(uint32_t) ); + console_print("["); + + // Save current console colours + console_swap_colors(); + + if (mmap->type == 1) + { + console_set_colors(COLOR_GREEN, COLOR_BLACK); + console_print(" FREE "); + } else { + console_set_colors(COLOR_RED, COLOR_BLACK); + console_print(" RESERVED "); + } + // Restore old console colours + console_swap_colors(); + + console_print("] 0x%x to 0x%x = %d bytes\n", (uint32_t)mmap->addr, (uint32_t)mmap->addr + (uint32_t)mmap->len-1, (uint32_t)mmap->len ); } - - - //panic(0x4655434B); // (TEST) testing panic }
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