diff options
Diffstat (limited to 'kernel/entry.cpp')
| -rw-r--r-- | kernel/entry.cpp | 230 |
1 files changed, 0 insertions, 230 deletions
diff --git a/kernel/entry.cpp b/kernel/entry.cpp deleted file mode 100644 index cc74e69..0000000 --- a/kernel/entry.cpp +++ /dev/null @@ -1,230 +0,0 @@ -#include <hilbert/kernel/storage/bd/memory.hpp> -#include <hilbert/kernel/storage/fs/tarfs.hpp> -#include <hilbert/kernel/application.hpp> -#include <hilbert/kernel/framebuffer.hpp> -#include <hilbert/kernel/terminal.hpp> -#include <hilbert/kernel/paging.hpp> -#include <hilbert/kernel/input.hpp> -#include <hilbert/kernel/panic.hpp> -#include <hilbert/kernel/vfile.hpp> -#include "../limine/limine.h" - -using namespace hilbert::kernel; - -LIMINE_BASE_REVISION(1) - -static volatile limine_memmap_request memmap_request { - .id = LIMINE_MEMMAP_REQUEST, - .revision = 0, - .response = 0 -}; - -static volatile limine_kernel_address_request kernel_address_request { - .id = LIMINE_KERNEL_ADDRESS_REQUEST, - .revision = 0, - .response = 0 -}; - -static volatile limine_framebuffer_request framebuffer_request { - .id = LIMINE_FRAMEBUFFER_REQUEST, - .revision = 0, - .response = 0 -}; - -static volatile limine_hhdm_request hhdm_request { - .id = LIMINE_HHDM_REQUEST, - .revision = 0, - .response = 0 -}; - -static limine_internal_module initfs_module = { - .path = "initfs.tgz", - .cmdline = "initfs", - .flags = LIMINE_INTERNAL_MODULE_REQUIRED | LIMINE_INTERNAL_MODULE_COMPRESSED -}; - -static limine_internal_module termfont_module = { - .path = "termfont.psf", - .cmdline = "termfont", - .flags = LIMINE_INTERNAL_MODULE_REQUIRED -}; - -static limine_internal_module *internal_modules[] = { - &initfs_module, &termfont_module -}; - -static volatile limine_module_request module_request = { - .id = LIMINE_MODULE_REQUEST, - .revision = 2, - .response = 0, - .internal_module_count = 2, - .internal_modules = internal_modules -}; - -bool try_map_module_by_cmdline( - const char *cmdline, void *&vaddr_out, uint64_t &len_out -) { - auto response = module_request.response; - for (uint64_t i = 0; i < response->module_count; ++i) { - limine_file *file = response->modules[i]; - for (uint64_t j = 0; cmdline[j] == file->cmdline[j]; ++j) - if (!cmdline[j]) { - - //module start is guaranteed to be page-aligned, end is not. - uint64_t start_paddr = - (uint64_t)file->address - hhdm_request.response->offset; - uint64_t end_paddr = - ((start_paddr + file->size - 1) / 4096 + 1) * 4096; - - uint64_t start_vaddr = - paging::find_unmapped_vram_region((end_paddr - start_paddr) / 4096); - for (uint64_t i = 0; i < end_paddr - start_paddr; i += 4096) - paging::map_kernel_page( - start_paddr + i, start_vaddr + i, true, false); - - vaddr_out = (void *)start_vaddr; - len_out = file->size; - - return true; - } - } - return false; -} - -//defined in linker script, page-aligned: -extern uint8_t __kernel_start; -extern uint8_t __kernel_end; -extern uint8_t __kernel_rx_start; -extern uint8_t __kernel_rx_end; -extern uint8_t __kernel_ro_start; -extern uint8_t __kernel_ro_end; -extern uint8_t __kernel_rw_start; -extern uint8_t __kernel_rw_end; - -uint8_t *initfs; -uint64_t initfs_len; - -[[noreturn]] static void with_kernel_p4(); - -extern "C" void load_gdt_and_idt(); - -extern "C" [[noreturn]] void entry() { - - //TODO?: maybe we should check if the limine requests were - // fulfilled and display some error message if not - - //set up the physical memory usage bitmap: - - paging::mark_all_pram_used(); - auto memmap = memmap_request.response; - for (uint64_t i = 0; i < memmap->entry_count; ++i) { - //we don't allocate any physical pages until after we are done using limine - //structures (specifically at the call to paging::map_kernel_stacks), so - //we consider bootloader reclaimable to be free. usable and bootloader - //reclaimable are guaranteed by limine spec to be page-aligned. - auto entry = memmap->entries[i]; - if (entry->type == LIMINE_MEMMAP_USABLE || - entry->type == LIMINE_MEMMAP_BOOTLOADER_RECLAIMABLE) - paging::mark_pram_region_free(entry->base, entry->base + entry->length); - } - - //set up page mappings: - - auto kernel_address = kernel_address_request.response; - uint64_t kernel_offset = kernel_address->virtual_base - - kernel_address->physical_base; - - uint64_t hhdm = hhdm_request.response->offset; - - //framebuffer might not be page-aligned - auto framebuffer = framebuffer_request.response->framebuffers[0]; - uint64_t fb_start = ((uint64_t)framebuffer->address / 4096) * 4096 - hhdm; - uint64_t fb_end = (uint64_t)framebuffer->address - + framebuffer->pitch * framebuffer->height - hhdm; - fb_end = ((fb_end - 1) / 4096 + 1) * 4096; - - paging::init_kernel_page_tables(kernel_offset); - - //kernel image rx - for (uint64_t vaddr = (uint64_t)&__kernel_rx_start; - vaddr < (uint64_t)&__kernel_rx_end; vaddr += 4096) - paging::map_kernel_page(vaddr - kernel_offset, vaddr, false, true); - - //kernel image ro - for (uint64_t vaddr = (uint64_t)&__kernel_ro_start; - vaddr < (uint64_t)&__kernel_ro_end; vaddr += 4096) - paging::map_kernel_page(vaddr - kernel_offset, vaddr, false, false); - - //kernel image rw - for (uint64_t vaddr = (uint64_t)&__kernel_rw_start; - vaddr < (uint64_t)&__kernel_rw_end; vaddr += 4096) - paging::map_kernel_page(vaddr - kernel_offset, vaddr, true, false); - - //framebuffer - uint64_t fb_vaddr = - paging::find_unmapped_vram_region((fb_end - fb_start) / 4096); - for (uint64_t i = 0; i < fb_end - fb_start; i += 4096) - paging::map_kernel_page(fb_start + i, fb_vaddr + i, true, false); - - //initfs and termfont - these are required modules - //so there is no worry about them not being present. - try_map_module_by_cmdline("initfs", (void *&)initfs, initfs_len); - try_map_module_by_cmdline( - "termfont", (void *&)terminal::termfont, terminal::termfont_len); - - //set up framebuffer and terminal: - //TODO: assumes framebuffer is 32-bpp rgb - - framebuffer::init_framebuffer(fb_start, fb_vaddr, - framebuffer->width, framebuffer->height, framebuffer->pitch); - - //switch to kernel p4 - - paging::map_kernel_stacks(); - load_gdt_and_idt(); - switch_to_kernel_p4(&with_kernel_p4); - -} - -extern "C" [[noreturn]] void start_user_mode( - uint64_t rip, uint64_t rsp, uint64_t p4_paddr); - -[[noreturn]] static void with_kernel_p4() { - - terminal::init_terminal(); - - auto *initfs_bd = new storage::bd::memory(initfs, initfs_len); - auto *initfs_fs = new storage::fs::tarfs_instance(initfs_bd); - initfs_bd->mounted_as = initfs_fs; - - vfile::vfile initfs_root; - initfs_root.bd = initfs_bd; - initfs_root.dir_entry.type = storage::file_type::directory; - initfs_root.path.absolute = true; - - if (initfs_fs->get_root_node(initfs_root.dir_entry.node) != - storage::fs_result::success) - panic("failed to get root node of initfs."); - - vfile::set_root(initfs_root); - - input::init_input(); - - utility::string init_path_string("/bin/init.elf", 13); - vfile::canon_path init_path; - vfile::canonize_path(init_path_string, init_path); - - vfile::vfile init_file; - if (vfile::lookup_path(init_path, init_file, true) != - storage::fs_result::success) - panic("failed to look up /bin/init.elf."); - - application::app_instance *init; - if (application::create_app(init_file, init, initfs_root) != - application::create_app_result::success) - panic("failed to parse /bin/init.elf."); - - application::running_app = init; - start_user_mode(init->saved_regs.rip, init->saved_regs.rsp, init->p4_paddr); - -} |