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ccf3fe02e3
Impact: use new interface instead of previous ad hoc implementation Rather than having special purpose init_pg_table_start/end variables to delimit the kernel pagetable built by head_32.S, just use the brk mechanism to extend the bss for the new pagetable. This patch removes init_pg_table_start/end and pg0, defines __brk_base (which is page-aligned and immediately follows _end), initializes the brk region to start there, and uses it for the 32-bit pagetable. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
122 lines
2.7 KiB
C
122 lines
2.7 KiB
C
#ifndef _ASM_X86_SETUP_H
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#define _ASM_X86_SETUP_H
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#ifdef __KERNEL__
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#define COMMAND_LINE_SIZE 2048
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#ifndef __ASSEMBLY__
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/*
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* Any setup quirks to be performed?
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*/
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struct mpc_cpu;
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struct mpc_bus;
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struct mpc_oemtable;
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struct x86_quirks {
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int (*arch_pre_time_init)(void);
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int (*arch_time_init)(void);
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int (*arch_pre_intr_init)(void);
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int (*arch_intr_init)(void);
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int (*arch_trap_init)(void);
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char * (*arch_memory_setup)(void);
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int (*mach_get_smp_config)(unsigned int early);
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int (*mach_find_smp_config)(unsigned int reserve);
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int *mpc_record;
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int (*mpc_apic_id)(struct mpc_cpu *m);
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void (*mpc_oem_bus_info)(struct mpc_bus *m, char *name);
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void (*mpc_oem_pci_bus)(struct mpc_bus *m);
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void (*smp_read_mpc_oem)(struct mpc_oemtable *oemtable,
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unsigned short oemsize);
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int (*setup_ioapic_ids)(void);
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};
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extern void x86_quirk_pre_intr_init(void);
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extern void x86_quirk_intr_init(void);
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extern void x86_quirk_trap_init(void);
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extern void x86_quirk_pre_time_init(void);
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extern void x86_quirk_time_init(void);
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#endif /* __ASSEMBLY__ */
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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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/* Interrupt control for vSMPowered x86_64 systems */
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#ifdef CONFIG_X86_VSMP
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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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void setup_bios_corruption_check(void);
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#ifdef CONFIG_X86_VISWS
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extern void visws_early_detect(void);
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extern int is_visws_box(void);
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#else
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static inline void visws_early_detect(void) { }
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static inline int is_visws_box(void) { return 0; }
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#endif
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extern struct x86_quirks *x86_quirks;
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extern unsigned long saved_video_mode;
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#ifndef CONFIG_PARAVIRT
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#define paravirt_post_allocator_init() do {} while (0)
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#endif
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#ifndef _SETUP
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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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/*
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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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#ifdef __i386__
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void __init i386_start_kernel(void);
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extern void probe_roms(void);
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#else
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void __init x86_64_start_kernel(char *real_mode);
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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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#endif /* __ASSEMBLY__ */
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#endif /* __KERNEL__ */
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#endif /* _ASM_X86_SETUP_H */
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