^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * arch/alpha/boot/bootpz.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 1997 Jay Estabrook
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * This file is used for creating a compressed BOOTP file for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Linux/AXP kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * based significantly on the arch/alpha/boot/main.c of Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * and the decompression code from MILO.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <generated/utsrelease.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/console.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/hwrpb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <stdarg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "kzsize.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) /* FIXME FIXME FIXME */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define MALLOC_AREA_SIZE 0x200000 /* 2MB for now */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) /* FIXME FIXME FIXME */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) WARNING NOTE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) It is very possible that turning on additional messages may cause
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) kernel image corruption due to stack usage to do the printing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #undef DEBUG_CHECK_RANGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #undef DEBUG_ADDRESSES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #undef DEBUG_LAST_STEPS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) extern unsigned long switch_to_osf_pal(unsigned long nr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct pcb_struct * pcb_va, struct pcb_struct * pcb_pa,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) unsigned long *vptb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) extern int decompress_kernel(void* destination, void *source,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) size_t ksize, size_t kzsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) extern void move_stack(unsigned long new_stack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct hwrpb_struct *hwrpb = INIT_HWRPB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static struct pcb_struct pcb_va[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * Find a physical address of a virtual object..
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * This is easy using the virtual page table address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #define VPTB ((unsigned long *) 0x200000000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static inline unsigned long
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) find_pa(unsigned long address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) unsigned long result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) result = VPTB[address >> 13];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) result >>= 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) result <<= 13;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) result |= address & 0x1fff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) check_range(unsigned long vstart, unsigned long vend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) unsigned long kstart, unsigned long kend)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) unsigned long vaddr, kaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) #ifdef DEBUG_CHECK_RANGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) srm_printk("check_range: V[0x%lx:0x%lx] K[0x%lx:0x%lx]\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) vstart, vend, kstart, kend);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) /* do some range checking for detecting an overlap... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) for (vaddr = vstart; vaddr <= vend; vaddr += PAGE_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) kaddr = (find_pa(vaddr) | PAGE_OFFSET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if (kaddr >= kstart && kaddr <= kend)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) #ifdef DEBUG_CHECK_RANGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) srm_printk("OVERLAP: vaddr 0x%lx kaddr 0x%lx"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) " [0x%lx:0x%lx]\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) vaddr, kaddr, kstart, kend);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * This function moves into OSF/1 pal-code, and has a temporary
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * PCB for that. The kernel proper should replace this PCB with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * the real one as soon as possible.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * The page table muckery in here depends on the fact that the boot
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * code has the L1 page table identity-map itself in the second PTE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) * in the L1 page table. Thus the L1-page is virtually addressable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * itself (through three levels) at virtual address 0x200802000.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #define L1 ((unsigned long *) 0x200802000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) pal_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) unsigned long i, rev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) struct percpu_struct * percpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct pcb_struct * pcb_pa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) /* Create the dummy PCB. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) pcb_va->ksp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) pcb_va->usp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) pcb_va->ptbr = L1[1] >> 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) pcb_va->asn = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) pcb_va->pcc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) pcb_va->unique = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) pcb_va->flags = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) pcb_va->res1 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) pcb_va->res2 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) pcb_pa = (struct pcb_struct *)find_pa((unsigned long)pcb_va);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * a0 = 2 (OSF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) * a1 = return address, but we give the asm the vaddr of the PCB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) * a2 = physical addr of PCB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) * a3 = new virtual page table pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) * a4 = KSP (but the asm sets it)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) srm_printk("Switching to OSF PAL-code... ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) i = switch_to_osf_pal(2, pcb_va, pcb_pa, VPTB);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) srm_printk("failed, code %ld\n", i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) __halt();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) percpu = (struct percpu_struct *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) (INIT_HWRPB->processor_offset + (unsigned long) INIT_HWRPB);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) rev = percpu->pal_revision = percpu->palcode_avail[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) srm_printk("OK (rev %lx)\n", rev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) tbia(); /* do it directly in case we are SMP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * Start the kernel.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static inline void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) runkernel(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) __asm__ __volatile__(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) "bis %0,%0,$27\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) "jmp ($27)"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) : /* no outputs: it doesn't even return */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) : "r" (START_ADDR));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) /* Must record the SP (it is virtual) on entry, so we can make sure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) not to overwrite it during movement or decompression. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) unsigned long SP_on_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /* Calculate the kernel image address based on the end of the BOOTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) bootstrapper (ie this program).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) extern char _end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) #define KERNEL_ORIGIN \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) ((((unsigned long)&_end) + 511) & ~511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) /* Round address to next higher page boundary. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) #define NEXT_PAGE(a) (((a) | (PAGE_SIZE - 1)) + 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) #ifdef INITRD_IMAGE_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) # define REAL_INITRD_SIZE INITRD_IMAGE_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) # define REAL_INITRD_SIZE 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) /* Defines from include/asm-alpha/system.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) BOOT_ADDR Virtual address at which the consoles loads
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) the BOOTP image.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) KERNEL_START KSEG address at which the kernel is built to run,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) which includes some initial data pages before the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) START_ADDR KSEG address of the entry point of kernel code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) ZERO_PGE KSEG address of page full of zeroes, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) upon entry to kerne cvan be expected
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) to hold the parameter list and possible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) INTRD information.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) These are used in the local defines below.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) /* Virtual addresses for the BOOTP image. Note that this includes the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) bootstrapper code as well as the compressed kernel image, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) possibly the INITRD image.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) Oh, and do NOT forget the STACK, which appears to be placed virtually
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) beyond the end of the loaded image.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) #define V_BOOT_IMAGE_START BOOT_ADDR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) #define V_BOOT_IMAGE_END SP_on_entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) /* Virtual addresses for just the bootstrapper part of the BOOTP image. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) #define V_BOOTSTRAPPER_START BOOT_ADDR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) #define V_BOOTSTRAPPER_END KERNEL_ORIGIN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) /* Virtual addresses for just the data part of the BOOTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) image. This may also include the INITRD image, but always
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) includes the STACK.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) #define V_DATA_START KERNEL_ORIGIN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) #define V_INITRD_START (KERNEL_ORIGIN + KERNEL_Z_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) #define V_INTRD_END (V_INITRD_START + REAL_INITRD_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) #define V_DATA_END V_BOOT_IMAGE_END
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) /* KSEG addresses for the uncompressed kernel.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) Note that the end address includes workspace for the decompression.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) Note also that the DATA_START address is ZERO_PGE, to which we write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) just before jumping to the kernel image at START_ADDR.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) #define K_KERNEL_DATA_START ZERO_PGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) #define K_KERNEL_IMAGE_START START_ADDR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) #define K_KERNEL_IMAGE_END (START_ADDR + KERNEL_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) /* Define to where we may have to decompress the kernel image, before
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) we move it to the final position, in case of overlap. This will be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) above the final position of the kernel.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) Regardless of overlap, we move the INITRD image to the end of this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) copy area, because there needs to be a buffer area after the kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) for "bootmem" anyway.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) #define K_COPY_IMAGE_START NEXT_PAGE(K_KERNEL_IMAGE_END)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) /* Reserve one page below INITRD for the new stack. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) #define K_INITRD_START \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) NEXT_PAGE(K_COPY_IMAGE_START + KERNEL_SIZE + PAGE_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) #define K_COPY_IMAGE_END \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) (K_INITRD_START + REAL_INITRD_SIZE + MALLOC_AREA_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) #define K_COPY_IMAGE_SIZE \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) NEXT_PAGE(K_COPY_IMAGE_END - K_COPY_IMAGE_START)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) start_kernel(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) int must_move = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) /* Initialize these for the decompression-in-place situation,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) which is the smallest amount of work and most likely to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) occur when using the normal START_ADDR of the kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) (currently set to 16MB, to clear all console code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) unsigned long uncompressed_image_start = K_KERNEL_IMAGE_START;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) unsigned long uncompressed_image_end = K_KERNEL_IMAGE_END;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) unsigned long initrd_image_start = K_INITRD_START;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) * Note that this crufty stuff with static and envval
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) * and envbuf is because:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) * 1. Frequently, the stack is short, and we don't want to overrun;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) * 2. Frequently the stack is where we are going to copy the kernel to;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) * 3. A certain SRM console required the GET_ENV output to stack.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) * ??? A comment in the aboot sources indicates that the GET_ENV
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) * destination must be quadword aligned. Might this explain the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) * behaviour, rather than requiring output to the stack, which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) * seems rather far-fetched.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) static long nbytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) static char envval[256] __attribute__((aligned(8)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) register unsigned long asm_sp asm("30");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) SP_on_entry = asm_sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) srm_printk("Linux/Alpha BOOTPZ Loader for Linux " UTS_RELEASE "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) /* Validity check the HWRPB. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) if (INIT_HWRPB->pagesize != 8192) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) srm_printk("Expected 8kB pages, got %ldkB\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) INIT_HWRPB->pagesize >> 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (INIT_HWRPB->vptb != (unsigned long) VPTB) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) srm_printk("Expected vptb at %p, got %p\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) VPTB, (void *)INIT_HWRPB->vptb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) /* PALcode (re)initialization. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) pal_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) /* Get the parameter list from the console environment variable. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) nbytes = callback_getenv(ENV_BOOTED_OSFLAGS, envval, sizeof(envval));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) if (nbytes < 0 || nbytes >= sizeof(envval)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) nbytes = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) envval[nbytes] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) #ifdef DEBUG_ADDRESSES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) srm_printk("START_ADDR 0x%lx\n", START_ADDR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) srm_printk("KERNEL_ORIGIN 0x%lx\n", KERNEL_ORIGIN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) srm_printk("KERNEL_SIZE 0x%x\n", KERNEL_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) srm_printk("KERNEL_Z_SIZE 0x%x\n", KERNEL_Z_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) /* Since all the SRM consoles load the BOOTP image at virtual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) * 0x20000000, we have to ensure that the physical memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) * pages occupied by that image do NOT overlap the physical
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) * address range where the kernel wants to be run. This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) * causes real problems when attempting to cdecompress the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) * former into the latter... :-(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) * So, we may have to decompress/move the kernel/INITRD image
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) * virtual-to-physical someplace else first before moving
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) * kernel /INITRD to their final resting places... ;-}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) * Sigh...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) /* First, check to see if the range of addresses occupied by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) the bootstrapper part of the BOOTP image include any of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) physical pages into which the kernel will be placed for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) execution.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) We only need check on the final kernel image range, since we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) will put the INITRD someplace that we can be sure is not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) in conflict.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) if (check_range(V_BOOTSTRAPPER_START, V_BOOTSTRAPPER_END,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) K_KERNEL_DATA_START, K_KERNEL_IMAGE_END))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) srm_printk("FATAL ERROR: overlap of bootstrapper code\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) __halt();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) /* Next, check to see if the range of addresses occupied by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) the compressed kernel/INITRD/stack portion of the BOOTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) image include any of the physical pages into which the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) decompressed kernel or the INITRD will be placed for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) execution.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) if (check_range(V_DATA_START, V_DATA_END,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) K_KERNEL_IMAGE_START, K_COPY_IMAGE_END))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) #ifdef DEBUG_ADDRESSES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) srm_printk("OVERLAP: cannot decompress in place\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) uncompressed_image_start = K_COPY_IMAGE_START;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) uncompressed_image_end = K_COPY_IMAGE_END;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) must_move = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) /* Finally, check to see if the range of addresses
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) occupied by the compressed kernel/INITRD part of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) the BOOTP image include any of the physical pages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) into which that part is to be copied for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) decompression.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) while (check_range(V_DATA_START, V_DATA_END,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) uncompressed_image_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) uncompressed_image_end))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) #if 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) uncompressed_image_start += K_COPY_IMAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) uncompressed_image_end += K_COPY_IMAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) initrd_image_start += K_COPY_IMAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) /* Keep as close as possible to end of BOOTP image. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) uncompressed_image_start += PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) uncompressed_image_end += PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) initrd_image_start += PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) srm_printk("Starting to load the kernel with args '%s'\n", envval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) #ifdef DEBUG_ADDRESSES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) srm_printk("Decompressing the kernel...\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) "...from 0x%lx to 0x%lx size 0x%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) V_DATA_START,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) uncompressed_image_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) KERNEL_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) decompress_kernel((void *)uncompressed_image_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) (void *)V_DATA_START,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) KERNEL_SIZE, KERNEL_Z_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) * Now, move things to their final positions, if/as required.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) #ifdef INITRD_IMAGE_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) /* First, we always move the INITRD image, if present. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) #ifdef DEBUG_ADDRESSES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) srm_printk("Moving the INITRD image...\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) " from 0x%lx to 0x%lx size 0x%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) V_INITRD_START,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) initrd_image_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) INITRD_IMAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) memcpy((void *)initrd_image_start, (void *)V_INITRD_START,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) INITRD_IMAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) #endif /* INITRD_IMAGE_SIZE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) /* Next, we may have to move the uncompressed kernel to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) final destination.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) if (must_move) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) #ifdef DEBUG_ADDRESSES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) srm_printk("Moving the uncompressed kernel...\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) "...from 0x%lx to 0x%lx size 0x%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) uncompressed_image_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) K_KERNEL_IMAGE_START,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) (unsigned)KERNEL_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) * Move the stack to a safe place to ensure it won't be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) * overwritten by kernel image.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) move_stack(initrd_image_start - PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) memcpy((void *)K_KERNEL_IMAGE_START,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) (void *)uncompressed_image_start, KERNEL_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) /* Clear the zero page, then move the argument list in. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) #ifdef DEBUG_LAST_STEPS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) srm_printk("Preparing ZERO_PGE...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) memset((char*)ZERO_PGE, 0, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) strcpy((char*)ZERO_PGE, envval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) #ifdef INITRD_IMAGE_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) #ifdef DEBUG_LAST_STEPS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) srm_printk("Preparing INITRD info...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) /* Finally, set the INITRD paramenters for the kernel. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) ((long *)(ZERO_PGE+256))[0] = initrd_image_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) ((long *)(ZERO_PGE+256))[1] = INITRD_IMAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) #endif /* INITRD_IMAGE_SIZE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) #ifdef DEBUG_LAST_STEPS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) srm_printk("Doing 'runkernel()'...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) runkernel();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) /* dummy function, should never be called. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) void *__kmalloc(size_t size, gfp_t flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) return (void *)NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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