// SPDX-License-Identifier: GPL-2.0 #ifndef BOOT_H #define BOOT_H /* * Definitions used in the boot code. Also defines exported symbols needed * in the main code. * * Copyright (C) 2020-2022 Martin Whitaker. */ #define BSP_STACK_SIZE 16384 /* Stack size for the BSP */ #define AP_STACK_SIZE 1024 /* Stack size for each AP */ #define LOW_LOAD_ADDR 0x00010000 /* The low load address for the main program */ #define HIGH_LOAD_ADDR 0x00100000 /* The high load address for the main program */ #define SETUP_SECS 2 /* Size of the 16-bit setup code in sectors */ #define BOOT_SEG 0x07c0 /* Segment address for the 16-bit boot code */ #define SETUP_SEG 0x07e0 /* Segment address for the 16-bit setup code */ #define MAIN_SEG 0x1000 /* Segment address for the main program code when loaded by the 16-bit bootloader */ #define KERNEL_CS 0x10 /* 32-bit segment address for code */ #define KERNEL_DS 0x18 /* 32-bit segment address for data */ /* The following addresses are offsets from BOOT_SEG. */ #define BOOT_STACK ((1 + SETUP_SECS) * 512) #define BOOT_STACK_TOP ((MAIN_SEG - BOOT_SEG) << 4) /* The following definitions must match the Linux boot_params struct. */ #define E820_ENTRIES 0x1e8 /* offsetof(boot_params.e820_entries) */ #define E820_MAP 0x2d0 /* offsetof(boot_params.e820_table) */ #define E820_MAP_SIZE 128 /* max. number of entries in E820_MAP */ /* The following definitions must match the Linux e820_entry struct. */ #define E820_ADDR 0 /* offsetof(e820_entry.addr) */ #define E820_SIZE 8 /* offsetof(e820_entry.size) */ #define E820_TYPE 16 /* offsetof(e820_entry.type) */ #define E820_ENTRY_SIZE 20 /* sizeof(e820_entry) */ #ifndef __ASSEMBLY__ #include extern uint8_t _start[]; extern uint8_t startup[]; extern uint64_t pml4[]; extern uint64_t pdp[]; extern uint64_t pd0[]; extern uint64_t pd1[]; extern uint64_t pd2[]; extern uint64_t pd3[]; extern uintptr_t boot_params_addr; extern uint8_t ap_trampoline[]; extern uint32_t ap_startup_addr; extern uint8_t ap_trampoline_end[]; extern uint8_t _end[]; #endif /* ! __ASSEMBLY__ */ #endif /* BOOT_H */