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#include "main.h"
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#include "main.h"
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#include "printf.h"
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#include "printf.h"
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#include "asm.h"
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#include "asm.h"
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#define KERNEL_PHYSICAL_ADDRESS 0x0000
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#define KERNEL_VIRTUAL_ADDRESS 0x80000000
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#define KERNEL_BOOT_OFFSET 0x2000
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#define KERNEL_START &_binary_____________kernel_kernel_bin_start
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#define KERNEL_START ((void *) &_binary_____________kernel_kernel_bin_start)
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#define KERNEL_END &_binary_____________kernel_kernel_bin_end
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#define KERNEL_END ((void *) &_binary_____________kernel_kernel_bin_end)
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#define KERNEL_SIZE ((unsigned int) KERNEL_END - (unsigned int) KERNEL_START)
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#define KERNEL_SIZE ((unsigned int) KERNEL_END - (unsigned int) KERNEL_START)
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memmap_t memmap;
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memmap_t memmap;
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static void check_align(const void *addr, const char *desc)
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{
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    if ((unsigned int) addr % PAGE_SIZE != 0) {
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        printf("Error: %s not on page boundary\n", desc);
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        halt();
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    }
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}
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void bootstrap(void)
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void bootstrap(void)
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{
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{
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    printf("\nHelenOS PPC Bootloader\n");
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    printf("\nHelenOS PPC Bootloader\n");
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    check_align(KERNEL_START, "Kernel image");
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    check_align(&real_mode, "Bootstrap trampoline");
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    check_align(&trans, "Translation table");
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    void *real_mode_pa = ofw_translate(&real_mode);
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    void *phys = ofw_translate(&start);
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    void *trans_pa = ofw_translate(&trans);
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    void *memmap_pa = ofw_translate(&memmap);
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    printf("Memory statistics\n");
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    printf(" kernel image         at %L (size %d bytes)\n", KERNEL_START, KERNEL_SIZE);
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    printf(" memory map           at %L (physical %L)\n", &memmap, memmap_pa);
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    printf(" bootstrap trampoline at %L (physical %L)\n", &real_mode, real_mode_pa);
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    printf("loaded at %L (physical %L)\n", &start, phys);
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    printf(" translation table    at %L (physical %L)\n", &trans, trans_pa);
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    if (!ofw_memmap(&memmap)) {
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    if (!ofw_memmap(&memmap)) {
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        printf("Unable to get memory map\n");
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        printf("Unable to get memory map\n");
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        halt();
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        halt();
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    }
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    }
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    printf("total memory %d MB\n", memmap.total >> 20);
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    printf("Total memory %d MB\n", memmap.total >> 20);
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    unsigned int addr;
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    unsigned int pages;
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    if (ofw_map((void *) KERNEL_PHYSICAL_ADDRESS, (void *) KERNEL_VIRTUAL_ADDRESS, KERNEL_SIZE + KERNEL_BOOT_OFFSET, 0) != 0) {
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    for (addr = 0, pages = 0; addr < KERNEL_SIZE; addr += PAGE_SIZE, pages++) {
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        void *pa = ofw_translate(KERNEL_START + addr);
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        if ((unsigned int) pa < KERNEL_SIZE) {
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        printf("Unable to map kernel memory at %L (physical %L)\n", KERNEL_VIRTUAL_ADDRESS, KERNEL_PHYSICAL_ADDRESS);
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            printf("Error: Kernel image overlaps kernel physical area\n");
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        halt();
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            halt();
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        }
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        trans[addr >> PAGE_WIDTH] = pa;
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    }
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    }
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    printf("kernel memory mapped at %L (physical %L, size %d bytes)\n", KERNEL_VIRTUAL_ADDRESS, KERNEL_PHYSICAL_ADDRESS, KERNEL_SIZE);
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    // FIXME: relocate the kernel in real mode
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    memcpy((void *) KERNEL_VIRTUAL_ADDRESS, KERNEL_START, KERNEL_SIZE);
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    // FIXME: proper hardware detection & mapping
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    ofw_map((void *) 0x84000000, (void *) 0xf0000000, 0x01000000, 0);
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    ofw_map((void *) 0x80816000, (void *) 0xf2000000, 0x00018000, 0);
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    void *tramp = ofw_translate(&real_mode);
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    printf("bootstrap trampoline at %L (physical %L)\n", &real_mode, tramp);
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    printf("Booting the kernel...\n");
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    printf("Booting the kernel...\n");
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    flush_instruction_cache();
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    jump_to_kernel((void *) KERNEL_VIRTUAL_ADDRESS + KERNEL_BOOT_OFFSET, ofw_translate(&memmap), tramp);
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    jump_to_kernel(memmap_pa, trans_pa, pages, real_mode_pa);
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}
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}