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157 lines
4.0 KiB
157 lines
4.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_X86_SETUP_H |
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#define _ASM_X86_SETUP_H |
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#include <uapi/asm/setup.h> |
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#define COMMAND_LINE_SIZE 2048 |
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#include <linux/linkage.h> |
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#include <asm/page_types.h> |
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#ifdef __i386__ |
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#include <linux/pfn.h> |
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/* |
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* Reserved space for vmalloc and iomap - defined in asm/page.h |
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*/ |
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#define MAXMEM_PFN PFN_DOWN(MAXMEM) |
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#define MAX_NONPAE_PFN (1 << 20) |
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#endif /* __i386__ */ |
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#define PARAM_SIZE 4096 /* sizeof(struct boot_params) */ |
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#define OLD_CL_MAGIC 0xA33F |
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#define OLD_CL_ADDRESS 0x020 /* Relative to real mode data */ |
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#define NEW_CL_POINTER 0x228 /* Relative to real mode data */ |
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#ifndef __ASSEMBLY__ |
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#include <asm/bootparam.h> |
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#include <asm/x86_init.h> |
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extern u64 relocated_ramdisk; |
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/* Interrupt control for vSMPowered x86_64 systems */ |
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#ifdef CONFIG_X86_64 |
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void vsmp_init(void); |
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#else |
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static inline void vsmp_init(void) { } |
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#endif |
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struct pt_regs; |
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void setup_bios_corruption_check(void); |
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void early_platform_quirks(void); |
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extern unsigned long saved_video_mode; |
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extern void reserve_standard_io_resources(void); |
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extern void i386_reserve_resources(void); |
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extern unsigned long __startup_64(unsigned long physaddr, struct boot_params *bp); |
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extern unsigned long __startup_secondary_64(void); |
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extern void startup_64_setup_env(unsigned long physbase); |
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extern void early_setup_idt(void); |
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extern void __init do_early_exception(struct pt_regs *regs, int trapnr); |
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#ifdef CONFIG_X86_INTEL_MID |
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extern void x86_intel_mid_early_setup(void); |
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#else |
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static inline void x86_intel_mid_early_setup(void) { } |
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#endif |
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#ifdef CONFIG_X86_INTEL_CE |
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extern void x86_ce4100_early_setup(void); |
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#else |
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static inline void x86_ce4100_early_setup(void) { } |
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#endif |
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#ifndef _SETUP |
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#include <asm/espfix.h> |
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#include <linux/kernel.h> |
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/* |
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* This is set up by the setup-routine at boot-time |
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*/ |
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extern struct boot_params boot_params; |
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extern char _text[]; |
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static inline bool kaslr_enabled(void) |
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{ |
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return IS_ENABLED(CONFIG_RANDOMIZE_MEMORY) && |
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!!(boot_params.hdr.loadflags & KASLR_FLAG); |
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} |
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/* |
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* Apply no randomization if KASLR was disabled at boot or if KASAN |
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* is enabled. KASAN shadow mappings rely on regions being PGD aligned. |
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*/ |
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static inline bool kaslr_memory_enabled(void) |
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{ |
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return kaslr_enabled() && !IS_ENABLED(CONFIG_KASAN); |
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} |
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static inline unsigned long kaslr_offset(void) |
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{ |
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return (unsigned long)&_text - __START_KERNEL; |
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} |
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/* |
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* Do NOT EVER look at the BIOS memory size location. |
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* It does not work on many machines. |
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*/ |
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#define LOWMEMSIZE() (0x9f000) |
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/* exceedingly early brk-like allocator */ |
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extern unsigned long _brk_end; |
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void *extend_brk(size_t size, size_t align); |
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/* |
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* Reserve space in the brk section. The name must be unique within |
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* the file, and somewhat descriptive. The size is in bytes. Must be |
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* used at file scope. |
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* |
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* (This uses a temp function to wrap the asm so we can pass it the |
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* size parameter; otherwise we wouldn't be able to. We can't use a |
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* "section" attribute on a normal variable because it always ends up |
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* being @progbits, which ends up allocating space in the vmlinux |
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* executable.) |
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*/ |
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#define RESERVE_BRK(name,sz) \ |
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static void __section(".discard.text") __used notrace \ |
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__brk_reservation_fn_##name##__(void) { \ |
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asm volatile ( \ |
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".pushsection .brk_reservation,\"aw\",@nobits;" \ |
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".brk." #name ":" \ |
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" 1:.skip %c0;" \ |
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" .size .brk." #name ", . - 1b;" \ |
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" .popsection" \ |
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: : "i" (sz)); \ |
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} |
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/* Helper for reserving space for arrays of things */ |
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#define RESERVE_BRK_ARRAY(type, name, entries) \ |
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type *name; \ |
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RESERVE_BRK(name, sizeof(type) * entries) |
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extern void probe_roms(void); |
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#ifdef __i386__ |
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asmlinkage void __init i386_start_kernel(void); |
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#else |
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asmlinkage void __init x86_64_start_kernel(char *real_mode); |
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asmlinkage void __init x86_64_start_reservations(char *real_mode_data); |
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#endif /* __i386__ */ |
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#endif /* _SETUP */ |
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#else |
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#define RESERVE_BRK(name,sz) \ |
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.pushsection .brk_reservation,"aw",@nobits; \ |
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.brk.name: \ |
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1: .skip sz; \ |
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.size .brk.name,.-1b; \ |
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.popsection |
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#endif /* __ASSEMBLY__ */ |
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#endif /* _ASM_X86_SETUP_H */
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