src/arch/x86/boot.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <arch/cpu.h>
   4 #include <commonlib/helpers.h>
   5 #include <console/console.h>
   6 #include <mode_switch.h>
   7 #include <program_loading.h>
   8 #include <symbols.h>
   9 #include <assert.h>
  10
  11 int payload_arch_usable_ram_quirk(uint64_t start, uint64_t size)
  12 {
  13         if (start < 1 * MiB && (start + size) <= 1 * MiB) {
  14                 printk(BIOS_DEBUG,
  15                         "Payload being loaded at below 1MiB without region being marked as RAM usable.\n");
  16                 return 1;
  17         }
  18
  19         return 0;
  20 }
  21
  22 void arch_prog_run(struct prog *prog)
  23 {
  24 #if ENV_RAMSTAGE && ENV_X86_64
  25         const uint32_t arg = pointer_to_uint32_safe(prog_entry_arg(prog));
  26         const uint32_t entry = pointer_to_uint32_safe(prog_entry(prog));
  27
  28         /* On x86 coreboot payloads expect to be called in protected mode */
  29         protected_mode_call_1arg((void *)(uintptr_t)entry, arg);
  30 #else
  31 #if ENV_X86_64
  32         void (*doit)(void *arg);
  33 #else
  34         /* Ensure the argument is pushed on the stack. */
  35         asmlinkage void (*doit)(void *arg);
  36 #endif
  37         doit = prog_entry(prog);
  38         doit(prog_entry_arg(prog));
  39 #endif
  40 }