135 lines
4.1 KiB
C
135 lines
4.1 KiB
C
#include "types.h"
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#include "version.h"
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#include "load_context.h"
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#include "Tier0/kstdio.h"
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#include "Tier0/kstdlib.h"
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#include "Tier0/gdt.h"
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#include "Tier0/paging.h"
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#include "Tier0/acpi.h"
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#include "Tier0/apic.h"
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#include "Tier0/smp.h"
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#include "Tier0/interrupts.h"
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//#include "Tier0/ps2.h"
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#include "Tier0/system.h"
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//#include "Tier0/pic.h"
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//#include "Tier0/kbd_layout.h"
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#include "Tier0/physmem.h"
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#include "Tier0/heap.h"
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#include "Tier0/cpp.h"
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#include "Tier0/exceptions.h"
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#include "Tier0/panic.h"
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//#include "Tier0/prng.h"
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extern u64 _start;
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extern u64 _end;
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void kmain_newstack(void);
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// Real kernel entry point, called from loader
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void kmain(u32 LoadContextAddress)
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{
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T_LOAD_CONTEXT *LoadContext = (T_LOAD_CONTEXT*)(u64)LoadContextAddress;
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kstdio_init();
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if (LoadContext->VGATextModeUsed)
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kstdio_set_globals(LoadContext->VGACurrentLine, LoadContext->VGACursorX, LoadContext->VGACursorY);
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else
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kclear();
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kprintf(" _ \n"
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" ___ _ _ ___ _ _ _____| |_ ___ ___ \n"
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" | _| | | _| | | | . | -_| _|\n"
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" |___|___|___|___|_|_|_|___|___|_| \n\n");
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kprintf("[i] Welcome to Cucumber (x86-64)!\n");
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kprintf("[i] %s\n\n", CUCUMBER_VERION);
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kprintf("[i] Load Context @%x \n", LoadContext);
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if (!LoadContext->MultibootUsed)
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PANIC("No Multiboot header provided by loader!");
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kprintf("[i] Multiboot header @%x\n", LoadContext->MultibootHeader);
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system_parse_cpu_features();
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extern T_SYSTEM_INFO g_SystemInfo;
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if (!CPUID_HAS(FPU))
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PANIC("CPU doesn't have FPU!");
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if (!CPUID_HAS(MSR))
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PANIC("CPU doesn't support MSR!");
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if (!CPUID_HAS(APIC))
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PANIC("CPU doesn't support APIC!");
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system_parse_load_context(LoadContext);
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kprintf("[i] Booting via %s.\n", LoadContext->LoaderName);
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kprintf("[i] Memory available: %uk.\n", system_get_memory_upper());
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kprintf("[i] Kernel physical: %x-%x.\n", LoadContext->KernelPhysicalStart, LoadContext->KernelPhysicalEnd);
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kprintf("[i] Loader physical: %x-%x.\n", LoadContext->LoaderPhysicalStart, LoadContext->LoaderPhysicalEnd);
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kprintf("[i] Kernel virtual: %x-%x.\n", &_start, &_end);
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paging_temp_page_setup();
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paging_minivmm_setup((u64)&_end, SYSTEM_KERNEL_VIRTUAL + 511 * 0x1000);
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// Let's create a new kernel stack
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u64 StackVirtual = paging_minivmm_allocate();
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kprintf("[i] New kernel stack 0x%x\n", StackVirtual);
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// And now let's use it and forget ebp because we can.
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__asm__ volatile("mov %0, %%rsp" : : "r" (StackVirtual + 4096));
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// And let's create a new stack frame.
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// (and prevent gcc from inlinin the function call)
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void (*kmain_newstack_ptr)() = kmain_newstack;
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kmain_newstack_ptr();
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}
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void kmain_newstack(void)
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{
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// Not using GDT in 64-bit mode... We'll use the loader-provided one.
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//gdt_create_flat();
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u64 RSDPAddress = acpi_find_rsdp();
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if (RSDPAddress == 0)
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kprintf("[w] No ACPI!\n");
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smp_initialize();
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interrupts_init_simple();
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exceptions_init_simple();
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apic_enable_lapic();
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for (;;) {}
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heap_init_simple();
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// enable FPU/SSE...
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__asm__ volatile(
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"movq %cr0, %rax;"
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"and $0xfffb, %ax;"
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"or $0x2, %rax;"
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"movq %rax, %cr0;"
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"movq %cr4, %rax;"
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"orq $0x600, %rax;"
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"movq %rax, %cr4;");
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//lua_State *State = lua_newstate(l_alloc, NULL);
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//luaL_checkversion(State);
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//luaL_openlibs(State);
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cpp_call_ctors();
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cpp_start_ckernel();
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kprintf("[i] Returned from Tier1, sleeping forever.\n");
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LOOPFOREVER;
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/*pic_init(0, 0);
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ps2_init_simple();
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kbd_layout_set_default();
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__asm__ volatile("sti");
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kprintf("[i] Hardware interrupts are now enabled.\n");
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kprintf("[i] Initializing PRNG...\n");
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u16 RLow, RHigh;
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__asm__ __volatile__ ("rdtsc" : "=a" (RLow), "=d" (RHigh));
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u32 R = (RHigh << 16) | RLow;
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kprintf("[i] %i\n", R);
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kseed(R);
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for (u32 Rl = 0; Rl < R; Rl++)
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{
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krand();
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} */
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}
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