int
start_linux(void)
{
void (*theKernel)(uint32_t zero, uint32_t arch, uint32_t *params);
uint32_t i = 0, j = 0,ret;
uint32_t *exec_at = ZIMAGE_LOAD_ADDRESS;
uint32_t *parm_at = (uint32_t *)( DRAM_BASE + 0x100) ; // 256 bytes away from the base address of DRAM
uint32_t machine_type;
debug_print("about to copy linux image to load address: ");
uart_print_address(exec_at);
ret = load_image((uint32_t)ZIMAGE_START_BLOCK_NUMBER,(uint32_t*)exec_at,(uint16_t)ZIMAGE_BLOCK_SIZE); /* copy image into RAM */
debug_print("done copying linux image ...\n\r\0");
// debug_print("about to copy ramdisk image ...");
// load_image((uint32_t*) INITRD_LOAD_ADDRESS, INITRD_LOAD_END_ADDRESS);/* copy initial ramdisk image into RAM */
// debug_print("done copying ramdisk image ...");
debug_print("setting up ATAGS ...\n\r\0");
setup_tags(parm_at); /* sets up parameters */
machine_type = 3466; /* get machine type */
theKernel = (void (*)(uint32_t, uint32_t, uint32_t*))exec_at; /* set the kernel address */
debug_print("jumping to the kernel ... brace yourself!\n\r\0");
asm("mrc p15, 0, r1, c1, c0, 0"); /* Read Control Register configuration data*/
asm("bic r1, r1, #(0x1 << 12)"); /* Disable I Cache*/
asm("bic r1, r1, #(0x1 << 2)"); /* Disable D Cache*/
asm("mcr p15, 0, r1, c1, c0, 0"); /* Write Control Register configuration data*/
theKernel(0, machine_type, parm_at); /* jump to kernel with register set */
return 0;
}
//control passed here from bootTestCrt.S after creating stack
int boot(){
uint32 *STORE1 = (uint32 *)0x4090002c; //Use RTC alarms as
uint32 *STORE2 = (uint32 *)0x40900030; // storage for debugging
int i,j;
*STORE1 = 0x98765;
setupLEDs();
setLEDs(GREEN);
uint32 *kernel = (uint32 *)(RAM_START + KERNEL_OFFSET);
uint32 *tags = (uint32 *)(RAM_START + TAGS_OFFSET);
uint32 cs;
setLEDs(GREEN);
//now we need to copy the kernel code to where it likes to be
cs = copyMem((uint32*)kernel_start,kernel, (kernel_end - kernel_start));
if(cs != KERN_CHECKSUM)
error(5,0);
setup_tags(tags);
setLEDs(BLUE);
uint32 mtype = MACH_TYPE_HPIPAQ214;
void (*theKernel)(uint32 zero, uint32 mtype, uint32 *tags);
theKernel = (void (*)(uint32, uint32, uint32 *))kernel; /* set the kernel address */
theKernel(0, mtype, tags); /* jump to kernel with register set */
death: __asm("nop");
goto death;
}
int
start_linux(void)
{
void (*theKernel)(uint32_t zero, uint32_t arch, uint32_t *params);
uint32_t i = 0, j = 0,ret;
load_addr = (uint32_t) ZIMAGE_LOAD_ADDRESS;
uint32_t *exec_at = ZIMAGE_LOAD_ADDRESS;
uint32_t *parm_at = (uint32_t *)( DRAM_BASE + 0x100) ; // 256 bytes away from the base address of DRAM
uint32_t machine_type;
// debug_print("about to copy linux image to load address: ");
// uart_print_address(exec_at);
// ret = load_image((uint32_t)ZIMAGE_START_BLOCK_NUMBER,(uint32_t*)exec_at,(uint16_t)2666); /* copy image into RAM */
// debug_print("done copying linux image ...\n\r");
// debug_print("about to copy ramdisk image ...");
// load_image((uint32_t*) INITRD_LOAD_ADDRESS, INITRD_LOAD_END_ADDRESS);/* copy initial ramdisk image into RAM */
// debug_print("done copying ramdisk image ...");
theKernel = (void (*)(uint32_t, uint32_t, uint32_t*))exec_at; /* set the kernel address */
print_format("Setting up timers next ...\n\r");
init_system_timer();
init_timer();
// uint32_t start_time = get_timer(0);
//
// while(1){
// print_format("time difference in ms is %d\n\r",start_time - get_timer(0));
// udelay(1000000);
// }
print_format("fetching kernel ... \n\r");
net_loop(TFTPGET);
// net_loop(ARP);
print_format("kernel loaded to RAM ...\n\r");
debug_print("setting up ATAGS ...\n\r");
setup_tags(parm_at); /* sets up parameters */
machine_type = 3466; /* get machine type */
debug_print("jumping to the kernel ... brace yourself!\n\r\0");
asm("mrc p15, 0, r1, c1, c0, 0"); /* Read Control Register configuration data*/
asm("bic r1, r1, #(0x1 << 12)"); /* Disable I Cache*/
asm("bic r1, r1, #(0x1 << 2)"); /* Disable D Cache*/
asm("mcr p15, 0, r1, c1, c0, 0"); /* Write Control Register configuration data*/
theKernel(0, machine_type, parm_at); /* jump to kernel with registers set */
// uint32_t start_time = get_timer(0);
// while(1){
// print_format("time difference in ms is %d\n\r",get_timer(start_time));
// udelay(1000000);
// }
return 0;
}
