#include <asm/processor.h>
#include <asm/mmu.h>
#include <asm/mpspec.h>
-#include <asm/trampoline.h>
#define COMPILER_DEPENDENT_INT64 long long
#define COMPILER_DEPENDENT_UINT64 unsigned long long
extern int acpi_suspend_lowlevel(void);
extern const unsigned char acpi_wakeup_code[];
-#define acpi_wakeup_address (__pa(TRAMPOLINE_SYM(acpi_wakeup_code)))
/* early initialization routine */
extern void acpi_reserve_wakeup_memory(void);
u32 level3_ident_pgt;
u32 level3_kernel_pgt;
#endif
+#ifdef CONFIG_ACPI_SLEEP
+ u32 wakeup_start;
+ u32 wakeup_header;
+#endif
} __attribute__((__packed__));
extern struct real_mode_header real_mode_header;
+++ /dev/null
-#ifndef _ASM_X86_TRAMPOLINE_H
-#define _ASM_X86_TRAMPOLINE_H
-
-#ifndef __ASSEMBLY__
-
-#include <linux/types.h>
-#include <asm/io.h>
-
-/*
- * Trampoline 80x86 program as an array. These are in the init rodata
- * segment, but that's okay, because we only care about the relative
- * addresses of the symbols.
- */
-extern const unsigned char x86_trampoline_start [];
-extern const unsigned char x86_trampoline_end [];
-extern unsigned char *x86_trampoline_base;
-
-extern unsigned long init_rsp;
-extern unsigned long initial_code;
-extern unsigned long initial_gs;
-
-extern void __init setup_trampolines(void);
-
-extern const unsigned char trampoline_data[];
-extern const unsigned char trampoline_status[];
-
-#define TRAMPOLINE_SYM(x) \
- ((void *)(x86_trampoline_base + \
- ((const unsigned char *)(x) - x86_trampoline_start)))
-
-/* Address of the SMP trampoline */
-static inline unsigned long trampoline_address(void)
-{
- return virt_to_phys(TRAMPOLINE_SYM(trampoline_data));
-}
-
-#endif /* __ASSEMBLY__ */
-
-#endif /* _ASM_X86_TRAMPOLINE_H */
obj-y += pci-iommu_table.o
obj-y += resource.o
-obj-y += trampoline.o trampoline_$(BITS).o
obj-y += realmode.o
obj-y += process.o
obj-y += i387.o xsave.o
-subdir- := realmode
-
obj-$(CONFIG_ACPI) += boot.o
-obj-$(CONFIG_ACPI_SLEEP) += sleep.o wakeup_rm.o wakeup_$(BITS).o
+obj-$(CONFIG_ACPI_SLEEP) += sleep.o wakeup_$(BITS).o
ifneq ($(CONFIG_ACPI_PROCESSOR),)
obj-y += cstate.o
endif
-$(obj)/wakeup_rm.o: $(obj)/realmode/wakeup.bin
-
-$(obj)/realmode/wakeup.bin: FORCE
- $(Q)$(MAKE) $(build)=$(obj)/realmode
-
+++ /dev/null
-wakeup.bin
-wakeup.elf
-wakeup.lds
+++ /dev/null
-#
-# arch/x86/kernel/acpi/realmode/Makefile
-#
-# This file is subject to the terms and conditions of the GNU General Public
-# License. See the file "COPYING" in the main directory of this archive
-# for more details.
-#
-
-always := wakeup.bin
-targets := wakeup.elf wakeup.lds
-
-wakeup-y += wakeup.o wakemain.o video-mode.o copy.o bioscall.o regs.o
-
-# The link order of the video-*.o modules can matter. In particular,
-# video-vga.o *must* be listed first, followed by video-vesa.o.
-# Hardware-specific drivers should follow in the order they should be
-# probed, and video-bios.o should typically be last.
-wakeup-y += video-vga.o
-wakeup-y += video-vesa.o
-wakeup-y += video-bios.o
-
-targets += $(wakeup-y)
-
-bootsrc := $(src)/../../../boot
-
-# ---------------------------------------------------------------------------
-
-# How to compile the 16-bit code. Note we always compile for -march=i386,
-# that way we can complain to the user if the CPU is insufficient.
-# Compile with _SETUP since this is similar to the boot-time setup code.
-KBUILD_CFLAGS := $(LINUXINCLUDE) -g -Os -D_SETUP -D_WAKEUP -D__KERNEL__ \
- -I$(srctree)/$(bootsrc) \
- $(cflags-y) \
- -Wall -Wstrict-prototypes \
- -march=i386 -mregparm=3 \
- -include $(srctree)/$(bootsrc)/code16gcc.h \
- -fno-strict-aliasing -fomit-frame-pointer \
- $(call cc-option, -ffreestanding) \
- $(call cc-option, -fno-toplevel-reorder,\
- $(call cc-option, -fno-unit-at-a-time)) \
- $(call cc-option, -fno-stack-protector) \
- $(call cc-option, -mpreferred-stack-boundary=2)
-KBUILD_CFLAGS += $(call cc-option, -m32)
-KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
-GCOV_PROFILE := n
-
-WAKEUP_OBJS = $(addprefix $(obj)/,$(wakeup-y))
-
-LDFLAGS_wakeup.elf := -T
-
-CPPFLAGS_wakeup.lds += -P -C
-
-$(obj)/wakeup.elf: $(obj)/wakeup.lds $(WAKEUP_OBJS) FORCE
- $(call if_changed,ld)
-
-OBJCOPYFLAGS_wakeup.bin := -O binary
-
-$(obj)/wakeup.bin: $(obj)/wakeup.elf FORCE
- $(call if_changed,objcopy)
+++ /dev/null
-#include "../../../boot/bioscall.S"
+++ /dev/null
-#include "../../../boot/copy.S"
+++ /dev/null
-#include "../../../boot/regs.c"
+++ /dev/null
-#include "../../../boot/video-bios.c"
+++ /dev/null
-#include "../../../boot/video-mode.c"
+++ /dev/null
-#include "../../../boot/video-vesa.c"
+++ /dev/null
-#include "../../../boot/video-vga.c"
+++ /dev/null
-#include "wakeup.h"
-#include "boot.h"
-
-static void udelay(int loops)
-{
- while (loops--)
- io_delay(); /* Approximately 1 us */
-}
-
-static void beep(unsigned int hz)
-{
- u8 enable;
-
- if (!hz) {
- enable = 0x00; /* Turn off speaker */
- } else {
- u16 div = 1193181/hz;
-
- outb(0xb6, 0x43); /* Ctr 2, squarewave, load, binary */
- io_delay();
- outb(div, 0x42); /* LSB of counter */
- io_delay();
- outb(div >> 8, 0x42); /* MSB of counter */
- io_delay();
-
- enable = 0x03; /* Turn on speaker */
- }
- inb(0x61); /* Dummy read of System Control Port B */
- io_delay();
- outb(enable, 0x61); /* Enable timer 2 output to speaker */
- io_delay();
-}
-
-#define DOT_HZ 880
-#define DASH_HZ 587
-#define US_PER_DOT 125000
-
-/* Okay, this is totally silly, but it's kind of fun. */
-static void send_morse(const char *pattern)
-{
- char s;
-
- while ((s = *pattern++)) {
- switch (s) {
- case '.':
- beep(DOT_HZ);
- udelay(US_PER_DOT);
- beep(0);
- udelay(US_PER_DOT);
- break;
- case '-':
- beep(DASH_HZ);
- udelay(US_PER_DOT * 3);
- beep(0);
- udelay(US_PER_DOT);
- break;
- default: /* Assume it's a space */
- udelay(US_PER_DOT * 3);
- break;
- }
- }
-}
-
-void main(void)
-{
- /* Kill machine if structures are wrong */
- if (wakeup_header.real_magic != 0x12345678)
- while (1);
-
- if (wakeup_header.realmode_flags & 4)
- send_morse("...-");
-
- if (wakeup_header.realmode_flags & 1)
- asm volatile("lcallw $0xc000,$3");
-
- if (wakeup_header.realmode_flags & 2) {
- /* Need to call BIOS */
- probe_cards(0);
- set_mode(wakeup_header.video_mode);
- }
-}
+++ /dev/null
-/*
- * ACPI wakeup real mode startup stub
- */
-#include <asm/segment.h>
-#include <asm/msr-index.h>
-#include <asm/page_types.h>
-#include <asm/pgtable_types.h>
-#include <asm/processor-flags.h>
-#include "wakeup.h"
-
- .code16
- .section ".jump", "ax"
- .globl _start
-_start:
- cli
- jmp wakeup_code
-
-/* This should match the structure in wakeup.h */
- .section ".header", "a"
- .globl wakeup_header
-wakeup_header:
-video_mode: .short 0 /* Video mode number */
-pmode_return: .byte 0x66, 0xea /* ljmpl */
- .long 0 /* offset goes here */
- .short __KERNEL_CS
-pmode_cr0: .long 0 /* Saved %cr0 */
-pmode_cr3: .long 0 /* Saved %cr3 */
-pmode_cr4: .long 0 /* Saved %cr4 */
-pmode_efer: .quad 0 /* Saved EFER */
-pmode_gdt: .quad 0
-pmode_misc_en: .quad 0 /* Saved MISC_ENABLE MSR */
-pmode_behavior: .long 0 /* Wakeup behavior flags */
-realmode_flags: .long 0
-real_magic: .long 0
-trampoline_segment: .word 0
-_pad1: .byte 0
-wakeup_jmp: .byte 0xea /* ljmpw */
-wakeup_jmp_off: .word 3f
-wakeup_jmp_seg: .word 0
-wakeup_gdt: .quad 0, 0, 0
-signature: .long WAKEUP_HEADER_SIGNATURE
-
- .text
- .code16
-wakeup_code:
- cld
-
- /* Apparently some dimwit BIOS programmers don't know how to
- program a PM to RM transition, and we might end up here with
- junk in the data segment descriptor registers. The only way
- to repair that is to go into PM and fix it ourselves... */
- movw $16, %cx
- lgdtl %cs:wakeup_gdt
- movl %cr0, %eax
- orb $X86_CR0_PE, %al
- movl %eax, %cr0
- jmp 1f
-1: ljmpw $8, $2f
-2:
- movw %cx, %ds
- movw %cx, %es
- movw %cx, %ss
- movw %cx, %fs
- movw %cx, %gs
-
- andb $~X86_CR0_PE, %al
- movl %eax, %cr0
- jmp wakeup_jmp
-3:
- /* Set up segments */
- movw %cs, %ax
- movw %ax, %ds
- movw %ax, %es
- movw %ax, %ss
- lidtl wakeup_idt
-
- movl $wakeup_stack_end, %esp
-
- /* Clear the EFLAGS */
- pushl $0
- popfl
-
- /* Check header signature... */
- movl signature, %eax
- cmpl $WAKEUP_HEADER_SIGNATURE, %eax
- jne bogus_real_magic
-
- /* Check we really have everything... */
- movl end_signature, %eax
- cmpl $WAKEUP_END_SIGNATURE, %eax
- jne bogus_real_magic
-
- /* Call the C code */
- calll main
-
- /* Restore MISC_ENABLE before entering protected mode, in case
- BIOS decided to clear XD_DISABLE during S3. */
- movl pmode_behavior, %eax
- btl $WAKEUP_BEHAVIOR_RESTORE_MISC_ENABLE, %eax
- jnc 1f
-
- movl pmode_misc_en, %eax
- movl pmode_misc_en + 4, %edx
- movl $MSR_IA32_MISC_ENABLE, %ecx
- wrmsr
-1:
-
- /* Do any other stuff... */
-
-#ifndef CONFIG_64BIT
- /* This could also be done in C code... */
- movl pmode_cr3, %eax
- movl %eax, %cr3
-
- movl pmode_cr4, %ecx
- jecxz 1f
- movl %ecx, %cr4
-1:
- movl pmode_efer, %eax
- movl pmode_efer + 4, %edx
- movl %eax, %ecx
- orl %edx, %ecx
- jz 1f
- movl $MSR_EFER, %ecx
- wrmsr
-1:
-
- lgdtl pmode_gdt
-
- /* This really couldn't... */
- movl pmode_cr0, %eax
- movl %eax, %cr0
- jmp pmode_return
-#else
- pushw $0
- pushw trampoline_segment
- pushw $0
- lret
-#endif
-
-bogus_real_magic:
-1:
- hlt
- jmp 1b
-
- .data
- .balign 8
-
- /* This is the standard real-mode IDT */
-wakeup_idt:
- .word 0xffff /* limit */
- .long 0 /* address */
- .word 0
-
- .globl HEAP, heap_end
-HEAP:
- .long wakeup_heap
-heap_end:
- .long wakeup_stack
-
- .bss
-wakeup_heap:
- .space 2048
-wakeup_stack:
- .space 2048
-wakeup_stack_end:
-
- .section ".signature","a"
-end_signature:
- .long WAKEUP_END_SIGNATURE
+++ /dev/null
-/*
- * Definitions for the wakeup data structure at the head of the
- * wakeup code.
- */
-
-#ifndef ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H
-#define ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H
-
-#ifndef __ASSEMBLY__
-#include <linux/types.h>
-
-/* This must match data at wakeup.S */
-struct wakeup_header {
- u16 video_mode; /* Video mode number */
- u16 _jmp1; /* ljmpl opcode, 32-bit only */
- u32 pmode_entry; /* Protected mode resume point, 32-bit only */
- u16 _jmp2; /* CS value, 32-bit only */
- u32 pmode_cr0; /* Protected mode cr0 */
- u32 pmode_cr3; /* Protected mode cr3 */
- u32 pmode_cr4; /* Protected mode cr4 */
- u32 pmode_efer_low; /* Protected mode EFER */
- u32 pmode_efer_high;
- u64 pmode_gdt;
- u32 pmode_misc_en_low; /* Protected mode MISC_ENABLE */
- u32 pmode_misc_en_high;
- u32 pmode_behavior; /* Wakeup routine behavior flags */
- u32 realmode_flags;
- u32 real_magic;
- u16 trampoline_segment; /* segment with trampoline code, 64-bit only */
- u8 _pad1;
- u8 wakeup_jmp;
- u16 wakeup_jmp_off;
- u16 wakeup_jmp_seg;
- u64 wakeup_gdt[3];
- u32 signature; /* To check we have correct structure */
-} __attribute__((__packed__));
-
-extern struct wakeup_header wakeup_header;
-#endif
-
-#define WAKEUP_HEADER_OFFSET 8
-#define WAKEUP_HEADER_SIGNATURE 0x51ee1111
-#define WAKEUP_END_SIGNATURE 0x65a22c82
-
-/* Wakeup behavior bits */
-#define WAKEUP_BEHAVIOR_RESTORE_MISC_ENABLE 0
-
-#endif /* ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H */
+++ /dev/null
-/*
- * wakeup.ld
- *
- * Linker script for the real-mode wakeup code
- */
-#undef i386
-#include "wakeup.h"
-
-OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
-OUTPUT_ARCH(i386)
-ENTRY(_start)
-
-SECTIONS
-{
- . = 0;
- .jump : {
- *(.jump)
- } = 0x90909090
-
- . = WAKEUP_HEADER_OFFSET;
- .header : {
- *(.header)
- }
-
- . = ALIGN(16);
- .text : {
- *(.text*)
- } = 0x90909090
-
- . = ALIGN(16);
- .rodata : {
- *(.rodata*)
- }
-
- .videocards : {
- video_cards = .;
- *(.videocards)
- video_cards_end = .;
- }
-
- . = ALIGN(16);
- .data : {
- *(.data*)
- }
-
- . = ALIGN(16);
- .bss : {
- __bss_start = .;
- *(.bss)
- __bss_end = .;
- }
-
- .signature : {
- *(.signature)
- }
-
- _end = .;
-
- /DISCARD/ : {
- *(.note*)
- }
-}
#include <asm/desc.h>
#include <asm/pgtable.h>
#include <asm/cacheflush.h>
+#include <asm/realmode.h>
-#include "realmode/wakeup.h"
+#include "../../realmode/rm/wakeup/wakeup.h"
#include "sleep.h"
unsigned long acpi_realmode_flags;
*/
int acpi_suspend_lowlevel(void)
{
- struct wakeup_header *header;
- /* address in low memory of the wakeup routine. */
- char *acpi_realmode;
+ struct wakeup_header *header =
+ (struct wakeup_header *) __va(real_mode_header.wakeup_header);
- acpi_realmode = TRAMPOLINE_SYM(acpi_wakeup_code);
-
- header = (struct wakeup_header *)(acpi_realmode + WAKEUP_HEADER_OFFSET);
if (header->signature != WAKEUP_HEADER_SIGNATURE) {
printk(KERN_ERR "wakeup header does not match\n");
return -EINVAL;
header->video_mode = saved_video_mode;
- header->wakeup_jmp_seg = acpi_wakeup_address >> 4;
-
- /*
- * Set up the wakeup GDT. We set these up as Big Real Mode,
- * that is, with limits set to 4 GB. At least the Lenovo
- * Thinkpad X61 is known to need this for the video BIOS
- * initialization quirk to work; this is likely to also
- * be the case for other laptops or integrated video devices.
- */
-
- /* GDT[0]: GDT self-pointer */
- header->wakeup_gdt[0] =
- (u64)(sizeof(header->wakeup_gdt) - 1) +
- ((u64)__pa(&header->wakeup_gdt) << 16);
- /* GDT[1]: big real mode-like code segment */
- header->wakeup_gdt[1] =
- GDT_ENTRY(0x809b, acpi_wakeup_address, 0xfffff);
- /* GDT[2]: big real mode-like data segment */
- header->wakeup_gdt[2] =
- GDT_ENTRY(0x8093, acpi_wakeup_address, 0xfffff);
-
#ifndef CONFIG_64BIT
store_gdt((struct desc_ptr *)&header->pmode_gdt);
header->pmode_cr3 = (u32)__pa(&initial_page_table);
saved_magic = 0x12345678;
#else /* CONFIG_64BIT */
- header->trampoline_segment = trampoline_address() >> 4;
#ifdef CONFIG_SMP
stack_start = (unsigned long)temp_stack + sizeof(temp_stack);
early_gdt_descr.address =
* Variables and functions used by the code in sleep.c
*/
-#include <asm/trampoline.h>
#include <linux/linkage.h>
+#include <asm/realmode.h>
extern unsigned long saved_video_mode;
extern long saved_magic;
+++ /dev/null
-/*
- * Wrapper script for the realmode binary as a transport object
- * before copying to low memory.
- */
-#include <asm/page_types.h>
-
- .section ".x86_trampoline","a"
- .balign PAGE_SIZE
- .globl acpi_wakeup_code
-acpi_wakeup_code:
- .incbin "arch/x86/kernel/acpi/realmode/wakeup.bin"
- .size acpi_wakeup_code, .-acpi_wakeup_code
#include <asm/sections.h>
#include <asm/e820.h>
#include <asm/page.h>
-#include <asm/trampoline.h>
#include <asm/apic.h>
#include <asm/io_apic.h>
#include <asm/bios_ebda.h>
#include <asm/sections.h>
#include <asm/kdebug.h>
#include <asm/e820.h>
-#include <asm/trampoline.h>
#include <asm/bios_ebda.h>
static void __init zap_identity_mappings(void)
#include <asm/proto.h>
#include <asm/bios_ebda.h>
#include <asm/e820.h>
-#include <asm/trampoline.h>
#include <asm/setup.h>
#include <asm/smp.h>
#include <asm/mtrr.h>
#include <asm/apic.h>
-#include <asm/trampoline.h>
#include <asm/realmode.h>
#include <asm/e820.h>
#include <asm/mpspec.h>
printk(KERN_DEBUG "initial memory mapped : 0 - %08lx\n",
max_pfn_mapped<<PAGE_SHIFT);
- setup_trampolines();
setup_real_mode();
init_gbpages();
#include <linux/mm.h>
#include <linux/tboot.h>
-#include <asm/trampoline.h>
+#include <asm/realmode.h>
#include <asm/processor.h>
#include <asm/bootparam.h>
#include <asm/pgtable.h>
add_mac_region(e820.map[i].addr, e820.map[i].size);
}
- tboot->acpi_sinfo.kernel_s3_resume_vector = acpi_wakeup_address;
+ tboot->acpi_sinfo.kernel_s3_resume_vector =
+ real_mode_header.wakeup_start;
return 0;
}
+++ /dev/null
-#include <linux/io.h>
-#include <linux/memblock.h>
-
-#include <asm/trampoline.h>
-#include <asm/cacheflush.h>
-#include <asm/pgtable.h>
-
-unsigned char *x86_trampoline_base;
-
-void __init setup_trampolines(void)
-{
- phys_addr_t mem;
- size_t size = PAGE_ALIGN(x86_trampoline_end - x86_trampoline_start);
-
- /* Has to be in very low memory so we can execute real-mode AP code. */
- mem = memblock_find_in_range(0, 1<<20, size, PAGE_SIZE);
- if (!mem)
- panic("Cannot allocate trampoline\n");
-
- x86_trampoline_base = __va(mem);
- memblock_reserve(mem, size);
-
- printk(KERN_DEBUG "Base memory trampoline at [%p] %llx size %zu\n",
- x86_trampoline_base, (unsigned long long)mem, size);
-
- memcpy(x86_trampoline_base, x86_trampoline_start, size);
-}
-
-/*
- * setup_trampolines() gets called very early, to guarantee the
- * availability of low memory. This is before the proper kernel page
- * tables are set up, so we cannot set page permissions in that
- * function. Thus, we use an arch_initcall instead.
- */
-static int __init configure_trampolines(void)
-{
- size_t size = PAGE_ALIGN(x86_trampoline_end - x86_trampoline_start);
-
- set_memory_x((unsigned long)x86_trampoline_base, size >> PAGE_SHIFT);
- return 0;
-}
-arch_initcall(configure_trampolines);
+++ /dev/null
-/*
- *
- * Trampoline.S Derived from Setup.S by Linus Torvalds
- *
- * 4 Jan 1997 Michael Chastain: changed to gnu as.
- *
- * This is only used for booting secondary CPUs in SMP machine
- *
- * Entry: CS:IP point to the start of our code, we are
- * in real mode with no stack, but the rest of the
- * trampoline page to make our stack and everything else
- * is a mystery.
- *
- * We jump into arch/x86/kernel/head_32.S.
- *
- * On entry to trampoline_data, the processor is in real mode
- * with 16-bit addressing and 16-bit data. CS has some value
- * and IP is zero. Thus, data addresses need to be absolute
- * (no relocation) and are taken with regard to r_base.
- *
- * If you work on this file, check the object module with
- * objdump --reloc to make sure there are no relocation
- * entries except for:
- *
- * TYPE VALUE
- * R_386_32 startup_32_smp
- * R_386_32 boot_gdt
- */
-
-#include <linux/linkage.h>
-#include <linux/init.h>
-#include <asm/segment.h>
-#include <asm/page_types.h>
-
-#ifdef CONFIG_SMP
-
- .section ".x86_trampoline","a"
- .balign PAGE_SIZE
- .code16
-
-ENTRY(trampoline_data)
-r_base = .
- wbinvd # Needed for NUMA-Q should be harmless for others
- mov %cs, %ax # Code and data in the same place
- mov %ax, %ds
-
- cli # We should be safe anyway
-
- movl $0xA5A5A5A5, trampoline_status - r_base
- # write marker for master knows we're running
-
- /* GDT tables in non default location kernel can be beyond 16MB and
- * lgdt will not be able to load the address as in real mode default
- * operand size is 16bit. Use lgdtl instead to force operand size
- * to 32 bit.
- */
-
- lidtl boot_idt_descr - r_base # load idt with 0, 0
- lgdtl boot_gdt_descr - r_base # load gdt with whatever is appropriate
-
- xor %ax, %ax
- inc %ax # protected mode (PE) bit
- lmsw %ax # into protected mode
- # flush prefetch and jump to startup_32_smp in arch/i386/kernel/head.S
- ljmpl $__BOOT_CS, $(startup_32_smp-__PAGE_OFFSET)
-
- # These need to be in the same 64K segment as the above;
- # hence we don't use the boot_gdt_descr defined in head.S
-boot_gdt_descr:
- .word __BOOT_DS + 7 # gdt limit
- .long boot_gdt - __PAGE_OFFSET # gdt base
-
-boot_idt_descr:
- .word 0 # idt limit = 0
- .long 0 # idt base = 0L
-
-ENTRY(trampoline_status)
- .long 0
-
-.globl trampoline_end
-trampoline_end:
-
-#endif /* CONFIG_SMP */
+++ /dev/null
-/*
- *
- * Trampoline.S Derived from Setup.S by Linus Torvalds
- *
- * 4 Jan 1997 Michael Chastain: changed to gnu as.
- * 15 Sept 2005 Eric Biederman: 64bit PIC support
- *
- * Entry: CS:IP point to the start of our code, we are
- * in real mode with no stack, but the rest of the
- * trampoline page to make our stack and everything else
- * is a mystery.
- *
- * On entry to trampoline_data, the processor is in real mode
- * with 16-bit addressing and 16-bit data. CS has some value
- * and IP is zero. Thus, data addresses need to be absolute
- * (no relocation) and are taken with regard to r_base.
- *
- * With the addition of trampoline_level4_pgt this code can
- * now enter a 64bit kernel that lives at arbitrary 64bit
- * physical addresses.
- *
- * If you work on this file, check the object module with objdump
- * --full-contents --reloc to make sure there are no relocation
- * entries.
- */
-
-#include <linux/linkage.h>
-#include <linux/init.h>
-#include <asm/pgtable_types.h>
-#include <asm/page_types.h>
-#include <asm/msr.h>
-#include <asm/segment.h>
-#include <asm/processor-flags.h>
-
- .section ".x86_trampoline","a"
- .balign PAGE_SIZE
- .code16
-
-ENTRY(trampoline_data)
-r_base = .
- cli # We should be safe anyway
- wbinvd
- mov %cs, %ax # Code and data in the same place
- mov %ax, %ds
- mov %ax, %es
- mov %ax, %ss
-
-
- movl $0xA5A5A5A5, trampoline_status - r_base
- # write marker for master knows we're running
-
- # Setup stack
- movw $(trampoline_stack_end - r_base), %sp
-
- call verify_cpu # Verify the cpu supports long mode
- testl %eax, %eax # Check for return code
- jnz no_longmode
-
- mov %cs, %ax
- movzx %ax, %esi # Find the 32bit trampoline location
- shll $4, %esi
-
- # Fixup the absolute vectors
- leal (startup_32 - r_base)(%esi), %eax
- movl %eax, startup_32_vector - r_base
- leal (startup_64 - r_base)(%esi), %eax
- movl %eax, startup_64_vector - r_base
- leal (tgdt - r_base)(%esi), %eax
- movl %eax, (tgdt + 2 - r_base)
-
- /*
- * GDT tables in non default location kernel can be beyond 16MB and
- * lgdt will not be able to load the address as in real mode default
- * operand size is 16bit. Use lgdtl instead to force operand size
- * to 32 bit.
- */
-
- lidtl tidt - r_base # load idt with 0, 0
- lgdtl tgdt - r_base # load gdt with whatever is appropriate
-
- mov $X86_CR0_PE, %ax # protected mode (PE) bit
- lmsw %ax # into protected mode
-
- # flush prefetch and jump to startup_32
- ljmpl *(startup_32_vector - r_base)
-
- .code32
- .balign 4
-startup_32:
- movl $__KERNEL_DS, %eax # Initialize the %ds segment register
- movl %eax, %ds
-
- movl $X86_CR4_PAE, %eax
- movl %eax, %cr4 # Enable PAE mode
-
- # Setup trampoline 4 level pagetables
- leal (trampoline_level4_pgt - r_base)(%esi), %eax
- movl %eax, %cr3
-
- movl $MSR_EFER, %ecx
- movl $(1 << _EFER_LME), %eax # Enable Long Mode
- xorl %edx, %edx
- wrmsr
-
- # Enable paging and in turn activate Long Mode
- # Enable protected mode
- movl $(X86_CR0_PG | X86_CR0_PE), %eax
- movl %eax, %cr0
-
- /*
- * At this point we're in long mode but in 32bit compatibility mode
- * with EFER.LME = 1, CS.L = 0, CS.D = 1 (and in turn
- * EFER.LMA = 1). Now we want to jump in 64bit mode, to do that we use
- * the new gdt/idt that has __KERNEL_CS with CS.L = 1.
- */
- ljmp *(startup_64_vector - r_base)(%esi)
-
- .code64
- .balign 4
-startup_64:
- # Now jump into the kernel using virtual addresses
- movq $secondary_startup_64, %rax
- jmp *%rax
-
- .code16
-no_longmode:
- hlt
- jmp no_longmode
-#include "verify_cpu.S"
-
- .balign 4
- # Careful these need to be in the same 64K segment as the above;
-tidt:
- .word 0 # idt limit = 0
- .word 0, 0 # idt base = 0L
-
- # Duplicate the global descriptor table
- # so the kernel can live anywhere
- .balign 4
-tgdt:
- .short tgdt_end - tgdt # gdt limit
- .long tgdt - r_base
- .short 0
- .quad 0x00cf9b000000ffff # __KERNEL32_CS
- .quad 0x00af9b000000ffff # __KERNEL_CS
- .quad 0x00cf93000000ffff # __KERNEL_DS
-tgdt_end:
-
- .balign 4
-startup_32_vector:
- .long startup_32 - r_base
- .word __KERNEL32_CS, 0
-
- .balign 4
-startup_64_vector:
- .long startup_64 - r_base
- .word __KERNEL_CS, 0
-
- .balign 4
-ENTRY(trampoline_status)
- .long 0
-
-trampoline_stack:
- .org 0x1000
-trampoline_stack_end:
-ENTRY(trampoline_level4_pgt)
- .quad level3_ident_pgt - __START_KERNEL_map + _KERNPG_TABLE
- .fill 510,8,0
- .quad level3_kernel_pgt - __START_KERNEL_map + _KERNPG_TABLE
-
-ENTRY(trampoline_end)
INIT_DATA_SECTION(16)
- /*
- * Code and data for a variety of lowlevel trampolines, to be
- * copied into base memory (< 1 MiB) during initialization.
- * Since it is copied early, the main copy can be discarded
- * afterwards.
- */
- .x86_trampoline : AT(ADDR(.x86_trampoline) - LOAD_OFFSET) {
- x86_trampoline_start = .;
- *(.x86_trampoline)
- x86_trampoline_end = .;
- }
-
.x86_cpu_dev.init : AT(ADDR(.x86_cpu_dev.init) - LOAD_OFFSET) {
__x86_cpu_dev_start = .;
*(.x86_cpu_dev.init)
realmode-y += header.o
realmode-$(CONFIG_X86_32) += reboot_32.o
realmode-y += trampoline_$(BITS).o
+realmode-$(CONFIG_ACPI_SLEEP) += wakeup/wakeup.o
targets += $(realmode-y)
+$(obj)/wakeup/wakeup.o: FORCE
+ $(Q)$(MAKE) $(build)=$(obj)/wakeup $@
+
REALMODE_OBJS = $(addprefix $(obj)/,$(realmode-y))
sed-pasyms := -n -r -e 's/^([0-9a-fA-F]+) [ABCDGRSTVW] (.+)$$/pa_\2 = \2;/p'
.long pa_startup_64_smp
.long pa_level3_ident_pgt
.long pa_level3_kernel_pgt
+#endif
+ /* ACPI sleep */
+#ifdef CONFIG_ACPI_SLEEP
+ .long pa_wakeup_start
+ .long pa_wakeup_header
#endif
END(real_mode_header)
.rodata : {
*(.rodata)
*(.rodata.*)
+ . = ALIGN(16);
+ video_cards = .;
+ *(.videocards)
+ video_cards_end = .;
}
. = ALIGN(PAGE_SIZE);
--- /dev/null
+wakeup.bin
+wakeup.elf
+wakeup.lds
--- /dev/null
+#
+# arch/x86/kernel/acpi/realmode/Makefile
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License. See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+
+always := wakeup.o
+
+wakeup-y += wakeup_asm.o wakemain.o video-mode.o
+wakeup-y += copy.o bioscall.o regs.o
+
+# The link order of the video-*.o modules can matter. In particular,
+# video-vga.o *must* be listed first, followed by video-vesa.o.
+# Hardware-specific drivers should follow in the order they should be
+# probed, and video-bios.o should typically be last.
+wakeup-y += video-vga.o
+wakeup-y += video-vesa.o
+wakeup-y += video-bios.o
+
+targets += $(wakeup-y)
+
+WAKEUP_OBJS = $(addprefix $(obj)/,$(wakeup-y))
+
+LDFLAGS_wakeup.o := -m elf_i386 -r
+$(obj)/wakeup.o: $(WAKEUP_OBJS) FORCE
+ $(call if_changed,ld)
+
+bootsrc := $(src)/../../../boot
+
+ccflags-y += -D_WAKEUP -I$(srctree)/$(bootsrc)
+asflags-y += -D_WAKEUP -I$(srctree)/$(bootsrc)
--- /dev/null
+#include "../../../boot/bioscall.S"
--- /dev/null
+#include "../../../boot/copy.S"
--- /dev/null
+#include "../../../boot/regs.c"
--- /dev/null
+#include "../../../boot/video-bios.c"
--- /dev/null
+#include "../../../boot/video-mode.c"
--- /dev/null
+#include "../../../boot/video-vesa.c"
--- /dev/null
+#include "../../../boot/video-vga.c"
--- /dev/null
+#include "wakeup.h"
+#include "boot.h"
+
+static void udelay(int loops)
+{
+ while (loops--)
+ io_delay(); /* Approximately 1 us */
+}
+
+static void beep(unsigned int hz)
+{
+ u8 enable;
+
+ if (!hz) {
+ enable = 0x00; /* Turn off speaker */
+ } else {
+ u16 div = 1193181/hz;
+
+ outb(0xb6, 0x43); /* Ctr 2, squarewave, load, binary */
+ io_delay();
+ outb(div, 0x42); /* LSB of counter */
+ io_delay();
+ outb(div >> 8, 0x42); /* MSB of counter */
+ io_delay();
+
+ enable = 0x03; /* Turn on speaker */
+ }
+ inb(0x61); /* Dummy read of System Control Port B */
+ io_delay();
+ outb(enable, 0x61); /* Enable timer 2 output to speaker */
+ io_delay();
+}
+
+#define DOT_HZ 880
+#define DASH_HZ 587
+#define US_PER_DOT 125000
+
+/* Okay, this is totally silly, but it's kind of fun. */
+static void send_morse(const char *pattern)
+{
+ char s;
+
+ while ((s = *pattern++)) {
+ switch (s) {
+ case '.':
+ beep(DOT_HZ);
+ udelay(US_PER_DOT);
+ beep(0);
+ udelay(US_PER_DOT);
+ break;
+ case '-':
+ beep(DASH_HZ);
+ udelay(US_PER_DOT * 3);
+ beep(0);
+ udelay(US_PER_DOT);
+ break;
+ default: /* Assume it's a space */
+ udelay(US_PER_DOT * 3);
+ break;
+ }
+ }
+}
+
+void main(void)
+{
+ /* Kill machine if structures are wrong */
+ if (wakeup_header.real_magic != 0x12345678)
+ while (1)
+ ;
+
+ if (wakeup_header.realmode_flags & 4)
+ send_morse("...-");
+
+ if (wakeup_header.realmode_flags & 1)
+ asm volatile("lcallw $0xc000,$3");
+
+ if (wakeup_header.realmode_flags & 2) {
+ /* Need to call BIOS */
+ probe_cards(0);
+ set_mode(wakeup_header.video_mode);
+ }
+}
--- /dev/null
+/*
+ * Definitions for the wakeup data structure at the head of the
+ * wakeup code.
+ */
+
+#ifndef ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H
+#define ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H
+
+#ifndef __ASSEMBLY__
+#include <linux/types.h>
+
+/* This must match data at wakeup.S */
+struct wakeup_header {
+ u16 video_mode; /* Video mode number */
+ u32 pmode_entry; /* Protected mode resume point, 32-bit only */
+ u16 pmode_cs;
+ u32 pmode_cr0; /* Protected mode cr0 */
+ u32 pmode_cr3; /* Protected mode cr3 */
+ u32 pmode_cr4; /* Protected mode cr4 */
+ u32 pmode_efer_low; /* Protected mode EFER */
+ u32 pmode_efer_high;
+ u64 pmode_gdt;
+ u32 pmode_misc_en_low; /* Protected mode MISC_ENABLE */
+ u32 pmode_misc_en_high;
+ u32 pmode_behavior; /* Wakeup routine behavior flags */
+ u32 realmode_flags;
+ u32 real_magic;
+ u32 signature; /* To check we have correct structure */
+} __attribute__((__packed__));
+
+extern struct wakeup_header wakeup_header;
+#endif
+
+#define WAKEUP_HEADER_OFFSET 8
+#define WAKEUP_HEADER_SIGNATURE 0x51ee1111
+#define WAKEUP_END_SIGNATURE 0x65a22c82
+
+/* Wakeup behavior bits */
+#define WAKEUP_BEHAVIOR_RESTORE_MISC_ENABLE 0
+
+#endif /* ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H */
--- /dev/null
+/*
+ * ACPI wakeup real mode startup stub
+ */
+#include <asm/segment.h>
+#include <asm/msr-index.h>
+#include <asm/page_types.h>
+#include <asm/pgtable_types.h>
+#include <asm/processor-flags.h>
+#include "wakeup.h"
+
+ .code16
+
+/* This should match the structure in wakeup.h */
+ .section ".data", "aw"
+ .globl wakeup_header
+wakeup_header:
+video_mode: .short 0 /* Video mode number */
+pmode_entry: .long 0
+pmode_cs: .short __KERNEL_CS
+pmode_cr0: .long 0 /* Saved %cr0 */
+pmode_cr3: .long 0 /* Saved %cr3 */
+pmode_cr4: .long 0 /* Saved %cr4 */
+pmode_efer: .quad 0 /* Saved EFER */
+pmode_gdt: .quad 0
+pmode_misc_en: .quad 0 /* Saved MISC_ENABLE MSR */
+pmode_behavior: .long 0 /* Wakeup behavior flags */
+realmode_flags: .long 0
+real_magic: .long 0
+signature: .long WAKEUP_HEADER_SIGNATURE
+ .size wakeup_header, .-wakeup_header
+
+ .text
+ .code16
+ .globl wakeup_start
+wakeup_start:
+ cli
+ cld
+
+ .byte 0xea /* ljmpw */
+ .word 3f
+ .word real_mode_seg
+3:
+ /* Apparently some dimwit BIOS programmers don't know how to
+ program a PM to RM transition, and we might end up here with
+ junk in the data segment descriptor registers. The only way
+ to repair that is to go into PM and fix it ourselves... */
+ movw $16, %cx
+ lgdtl %cs:wakeup_gdt
+ movl %cr0, %eax
+ orb $X86_CR0_PE, %al
+ movl %eax, %cr0
+ ljmpw $8, $2f
+2:
+ movw %cx, %ds
+ movw %cx, %es
+ movw %cx, %ss
+ movw %cx, %fs
+ movw %cx, %gs
+
+ andb $~X86_CR0_PE, %al
+ movl %eax, %cr0
+ .byte 0xea /* ljmpw */
+ .word 3f
+ .word real_mode_seg
+3:
+ /* Set up segments */
+ movw %cs, %ax
+ movw %ax, %ds
+ movw %ax, %es
+ movw %ax, %ss
+ lidtl wakeup_idt
+
+ movl $wakeup_stack_end, %esp
+
+ /* Clear the EFLAGS */
+ pushl $0
+ popfl
+
+ /* Check header signature... */
+ movl signature, %eax
+ cmpl $WAKEUP_HEADER_SIGNATURE, %eax
+ jne bogus_real_magic
+
+ /* Check we really have everything... */
+ movl end_signature, %eax
+ cmpl $WAKEUP_END_SIGNATURE, %eax
+ jne bogus_real_magic
+
+ /* Call the C code */
+ calll main
+
+ /* Restore MISC_ENABLE before entering protected mode, in case
+ BIOS decided to clear XD_DISABLE during S3. */
+ movl pmode_behavior, %eax
+ btl $WAKEUP_BEHAVIOR_RESTORE_MISC_ENABLE, %eax
+ jnc 1f
+
+ movl pmode_misc_en, %eax
+ movl pmode_misc_en + 4, %edx
+ movl $MSR_IA32_MISC_ENABLE, %ecx
+ wrmsr
+1:
+
+ /* Do any other stuff... */
+
+#ifndef CONFIG_64BIT
+ /* This could also be done in C code... */
+ movl pmode_cr3, %eax
+ movl %eax, %cr3
+
+ movl pmode_cr4, %ecx
+ jecxz 1f
+ movl %ecx, %cr4
+1:
+ movl pmode_efer, %eax
+ movl pmode_efer + 4, %edx
+ movl %eax, %ecx
+ orl %edx, %ecx
+ jz 1f
+ movl $MSR_EFER, %ecx
+ wrmsr
+1:
+
+ lgdtl pmode_gdt
+
+ /* This really couldn't... */
+ movl pmode_cr0, %eax
+ movl %eax, %cr0
+ ljmpl *pmode_entry
+#else
+ jmp trampoline_data
+#endif
+
+bogus_real_magic:
+1:
+ hlt
+ jmp 1b
+
+ .section ".rodata","a"
+
+ /*
+ * Set up the wakeup GDT. We set these up as Big Real Mode,
+ * that is, with limits set to 4 GB. At least the Lenovo
+ * Thinkpad X61 is known to need this for the video BIOS
+ * initialization quirk to work; this is likely to also
+ * be the case for other laptops or integrated video devices.
+ */
+
+ .globl wakeup_gdt
+ .balign 16
+wakeup_gdt:
+ .word 3*8-1 /* Self-descriptor */
+ .long pa_wakeup_gdt
+ .word 0
+
+ .word 0xffff /* 16-bit code segment @ real_mode_base */
+ .long 0x9b000000 + pa_real_mode_base
+ .word 0x008f /* big real mode */
+
+ .word 0xffff /* 16-bit data segment @ real_mode_base */
+ .long 0x93000000 + pa_real_mode_base
+ .word 0x008f /* big real mode */
+ .size wakeup_gdt, .-wakeup_gdt
+
+ .data
+ .balign 8
+
+ /* This is the standard real-mode IDT */
+wakeup_idt:
+ .word 0xffff /* limit */
+ .long 0 /* address */
+ .word 0
+
+ .globl HEAP, heap_end
+HEAP:
+ .long wakeup_heap
+heap_end:
+ .long wakeup_stack
+
+ .bss
+wakeup_heap:
+ .space 2048
+wakeup_stack:
+ .space 2048
+wakeup_stack_end:
+
+ .section ".signature","a"
+end_signature:
+ .long WAKEUP_END_SIGNATURE
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
+#include <asm/realmode.h>
+
#include "internal.h"
#include "sleep.h"
static int acpi_sleep_prepare(u32 acpi_state)
{
#ifdef CONFIG_ACPI_SLEEP
+ unsigned long wakeup_pa = real_mode_header.wakeup_start;
/* do we have a wakeup address for S2 and S3? */
if (acpi_state == ACPI_STATE_S3) {
- if (!acpi_wakeup_address) {
+ if (!wakeup_pa)
return -EFAULT;
- }
acpi_set_firmware_waking_vector(
- (acpi_physical_address)acpi_wakeup_address);
+ (acpi_physical_address)wakeup_pa);
}
ACPI_FLUSH_CPU_CACHE();
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff