diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/alpha/boot/main.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/alpha/boot/main.c | 191 |
1 files changed, 0 insertions, 191 deletions
diff --git a/ANDROID_3.4.5/arch/alpha/boot/main.c b/ANDROID_3.4.5/arch/alpha/boot/main.c deleted file mode 100644 index 3baf2d1e..00000000 --- a/ANDROID_3.4.5/arch/alpha/boot/main.c +++ /dev/null @@ -1,191 +0,0 @@ -/* - * arch/alpha/boot/main.c - * - * Copyright (C) 1994, 1995 Linus Torvalds - * - * This file is the bootloader for the Linux/AXP kernel - */ -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/string.h> -#include <generated/utsrelease.h> -#include <linux/mm.h> - -#include <asm/console.h> -#include <asm/hwrpb.h> -#include <asm/pgtable.h> - -#include <stdarg.h> - -#include "ksize.h" - -extern int vsprintf(char *, const char *, va_list); -extern unsigned long switch_to_osf_pal(unsigned long nr, - struct pcb_struct * pcb_va, struct pcb_struct * pcb_pa, - unsigned long *vptb); -struct hwrpb_struct *hwrpb = INIT_HWRPB; -static struct pcb_struct pcb_va[1]; - -/* - * Find a physical address of a virtual object.. - * - * This is easy using the virtual page table address. - */ - -static inline void * -find_pa(unsigned long *vptb, void *ptr) -{ - unsigned long address = (unsigned long) ptr; - unsigned long result; - - result = vptb[address >> 13]; - result >>= 32; - result <<= 13; - result |= address & 0x1fff; - return (void *) result; -} - -/* - * This function moves into OSF/1 pal-code, and has a temporary - * PCB for that. The kernel proper should replace this PCB with - * the real one as soon as possible. - * - * The page table muckery in here depends on the fact that the boot - * code has the L1 page table identity-map itself in the second PTE - * in the L1 page table. Thus the L1-page is virtually addressable - * itself (through three levels) at virtual address 0x200802000. - */ - -#define VPTB ((unsigned long *) 0x200000000) -#define L1 ((unsigned long *) 0x200802000) - -void -pal_init(void) -{ - unsigned long i, rev; - struct percpu_struct * percpu; - struct pcb_struct * pcb_pa; - - /* Create the dummy PCB. */ - pcb_va->ksp = 0; - pcb_va->usp = 0; - pcb_va->ptbr = L1[1] >> 32; - pcb_va->asn = 0; - pcb_va->pcc = 0; - pcb_va->unique = 0; - pcb_va->flags = 1; - pcb_va->res1 = 0; - pcb_va->res2 = 0; - pcb_pa = find_pa(VPTB, pcb_va); - - /* - * a0 = 2 (OSF) - * a1 = return address, but we give the asm the vaddr of the PCB - * a2 = physical addr of PCB - * a3 = new virtual page table pointer - * a4 = KSP (but the asm sets it) - */ - srm_printk("Switching to OSF PAL-code .. "); - - i = switch_to_osf_pal(2, pcb_va, pcb_pa, VPTB); - if (i) { - srm_printk("failed, code %ld\n", i); - __halt(); - } - - percpu = (struct percpu_struct *) - (INIT_HWRPB->processor_offset + (unsigned long) INIT_HWRPB); - rev = percpu->pal_revision = percpu->palcode_avail[2]; - - srm_printk("Ok (rev %lx)\n", rev); - - tbia(); /* do it directly in case we are SMP */ -} - -static inline long openboot(void) -{ - char bootdev[256]; - long result; - - result = callback_getenv(ENV_BOOTED_DEV, bootdev, 255); - if (result < 0) - return result; - return callback_open(bootdev, result & 255); -} - -static inline long close(long dev) -{ - return callback_close(dev); -} - -static inline long load(long dev, unsigned long addr, unsigned long count) -{ - char bootfile[256]; - extern char _end; - long result, boot_size = &_end - (char *) BOOT_ADDR; - - result = callback_getenv(ENV_BOOTED_FILE, bootfile, 255); - if (result < 0) - return result; - result &= 255; - bootfile[result] = '\0'; - if (result) - srm_printk("Boot file specification (%s) not implemented\n", - bootfile); - return callback_read(dev, count, (void *)addr, boot_size/512 + 1); -} - -/* - * Start the kernel. - */ -static void runkernel(void) -{ - __asm__ __volatile__( - "bis %1,%1,$30\n\t" - "bis %0,%0,$26\n\t" - "ret ($26)" - : /* no outputs: it doesn't even return */ - : "r" (START_ADDR), - "r" (PAGE_SIZE + INIT_STACK)); -} - -void start_kernel(void) -{ - long i; - long dev; - int nbytes; - char envval[256]; - - srm_printk("Linux/AXP bootloader for Linux " UTS_RELEASE "\n"); - if (INIT_HWRPB->pagesize != 8192) { - srm_printk("Expected 8kB pages, got %ldkB\n", INIT_HWRPB->pagesize >> 10); - return; - } - pal_init(); - dev = openboot(); - if (dev < 0) { - srm_printk("Unable to open boot device: %016lx\n", dev); - return; - } - dev &= 0xffffffff; - srm_printk("Loading vmlinux ..."); - i = load(dev, START_ADDR, KERNEL_SIZE); - close(dev); - if (i != KERNEL_SIZE) { - srm_printk("Failed (%lx)\n", i); - return; - } - - nbytes = callback_getenv(ENV_BOOTED_OSFLAGS, envval, sizeof(envval)); - if (nbytes < 0) { - nbytes = 0; - } - envval[nbytes] = '\0'; - strcpy((char*)ZERO_PGE, envval); - - srm_printk(" Ok\nNow booting the kernel\n"); - runkernel(); - for (i = 0 ; i < 0x100000000 ; i++) - /* nothing */; - __halt(); -} |