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fw_sections = parse_wr940n_firmware_header(filename);
/* Map the BIOS / boot exception handler. */
memory_region_init_rom(bios, NULL, "WR940NV6.bios.rom",
fw_sections.boot_loader_len, &error_fatal);
memory_region_add_subregion_overlap(address_space_mem, 0x1F000000,
bios, 0);
rom_add_blob_fixed(filename, fw_sections.bootloader,
fw_sections.boot_loader_len, 0x1F000000);
g_free(filename);
}
if (fw_sections.bootloader == 0) {
/* we don't have a kernel image nor boot vector code.*/
error_report("Could not load TP-Link FW Image bios '%s'",
machine->firmware);
exit(1);
} else {
/* We have a boot vector start address. */
env->active_tc.PC = (target_long)(int32_t)0x9F000400;
}
/* GPIO */
memory_region_init_io(gpio_mmio, NULL, &gpio_mmio_ops, NULL,
"GPIO_MMIO", 0x74);
memory_region_add_subregion(address_space_mem, 0x18040000LL,
gpio_mmio);
/* SPI */
struct SPI_IO *spi_io = g_malloc0(sizeof(struct SPI_IO));
spi_io->spi_contents = g_malloc0(fw_sections.boot_loader_len+1);
memcpy(spi_io->spi_contents, fw_sections.bootloader,
fw_sections.boot_loader_len);
memory_region_init_io(spi_mmio, NULL, &spi_mmio_ops, spi_io,
"SPI_MMIO", 0x20);
memory_region_add_subregion_overlap(address_space_mem, 0x1F000000LL,
spi_mmio, 1);
/* DDR */
memory_region_init_io(ddr_mmio, NULL, &ddr_mmio_ops, NULL,
"DDR_MMIO", 0x160);
memory_region_add_subregion(address_space_mem, 0x18000000LL,
ddr_mmio);
if (kernel_filename) {
loaderparams.ram_size = machine->ram_size;
loaderparams.kernel_filename = kernel_filename;
loaderparams.kernel_cmdline = kernel_cmdline;
loaderparams.initrd_filename = initrd_filename;
reset_info->vector = load_kernel();
}
/* Init CPU internal devices. */
cpu_mips_irq_init_cpu(cpu);
cpu_mips_clock_init(cpu);
memory_region_init_alias(isa, NULL, "isa_mmio",
get_system_io(), 0, 0x00010000);
memory_region_add_subregion(get_system_memory(), 0x1fd00000,
isa);
}
static void mips_wr940n_machine_init(MachineClass *mc)
{
mc->desc = "TP-Link WR940NV6 Board by b1ack0wl";
mc->init = mips_wr940n_init;
mc->default_cpu_type = MIPS_CPU_TYPE_NAME("74Kf");
mc->default_ram_size = 1 * GiB; // for debug reasons
mc->default_ram_id = "mips_wr940n.ram";
}
DEFINE_MACHINE("WR940NV6", mips_wr940n_machine_init)
```
Header File (wr940n.h)
* This needs to be put in the `qemu/include/hw/mips/` folder
```
#include <byteswap.h>
#include "hw/sysbus.h"
#include "chardev/char-fe.h"
struct fw_sections parse_wr940n_firmware_header(char *filename);
struct fw_sections{
char *bootloader;
int boot_loader_len;
char *kernel;
int kernel_len;
char *rootfs;
int root_fs_len;
};
/*
lifted from
https://github.com/jtreml/firmware-mod-kit/blob/master/src
/firmware-tools/mktplinkfw.c
*/
struct fw_header {
uint32_t version; /* header version */
char vendor_name[24];
char fw_version[36];
uint32_t hw_id; /* hardware id */