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(122-34.1-85.cust.bluewin.ch [85.1.34.122]) by mx.google.com with ESMTPS id 3sm4088527fge.19.2009.04.11.14.01.14 (version=SSLv3 cipher=RC4-MD5); Sat, 11 Apr 2009 14:01:16 -0700 (PDT) Message-ID: <49E1051F.6090704@gmail.com> Date: Sat, 11 Apr 2009 23:01:19 +0200 From: phcoder User-Agent: Thunderbird 2.0.0.21 (X11/20090318) MIME-Version: 1.0 To: The development of GRUB 2 Content-Type: multipart/mixed; boundary="------------020601080109050907050704" X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6 (newer, 2) Subject: mmap services X-BeenThere: grub-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: The development of GRUB 2 List-Id: The development of GRUB 2 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 11 Apr 2009 21:01:24 -0000 This is a multi-part message in MIME format. --------------020601080109050907050704 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hello. Here is the patch to allow different mmap filtering. It naturally incorporates badram and also intercepts int12/15 so it works also with OS recieving mmap from BIOS. It's useful for intercepting any bios interrupts -- Regards Vladimir 'phcoder' Serbinenko --------------020601080109050907050704 Content-Type: text/x-diff; name="mmap.diff" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="mmap.diff" diff --git a/ChangeLog b/ChangeLog index a6dd8f7..ce0eb8d 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,52 @@ +2009-04-11 Vladimir Serbinenko + + Mmap services + + * commands/lsmmap.c (grub_cmd_lsmmap): use grub_mmap_iterate + * loader/i386/linux.c (find_mmap_size): likewise + (allocate_pages): likewise + * loader/i386/multiboot.c (grub_get_multiboot_mmap_len): likewise + (grub_fill_multiboot_mmap): likewise + (grub_multiboot): use grub_mmap_get_lower and grub_mmap_get_upper + * loader/i386/pc/linux.c (grub_cmd_linux): use grub_mmap_get_lower + * include/grub/i386/bsd.h (OPENBSD_MMAP_AVAILABLE): new definition + (OPENBSD_MMAP_RESERVED): likewise + * include/grub/i386/pc/memory.h: include grub/memory.h + (grub_lower_mem): removed + (grub_upper_mem): likewise + (GRUB_MACHINE_MEMORY_ACPI): new definition + (GRUB_MACHINE_MEMORY_NVS): likewise + (GRUB_MACHINE_MEMORY_MAX_TYPE): likewise + (GRUB_MACHINE_MEMORY_HOLE): likewise + (grub_machine_mmap_register): likewise + (grub_machine_mmap_unregister): likewise + (grub_machine_get_upper): likewise + (grub_machine_get_lower): likewise + (grub_machine_get_post64): likewise + * conf/i386-pc.rmk (pkglib_MODULES): added mmap.mod + (mmap_mod_SOURCES): new variable + (mmap_mod_LDFLAGS): likewise + (mmap_mod_ASFLAGS): likewise + * conf/i386-coreboot.rmk: likewise + * conf/i386-ieee1275.rmk: likewise + * include/grub/types.h (UINT_TO_PTR): new macro + (PTR_TO_UINT32): likewise + (PTR_TO_UINT64): likewise + * include/grub/memory.h: new file + * mmap/i386/pc/mmap.c: likewise + * mmap/i386/pc/mmap_helper.S: likewise + * mmap/i386/uppermem.c: likewise + * mmap/mmap.c: likewise + * kern/i386/coreboot/init.c (grub_machine_init): don't use + grub_upper_mem + * kern/i386/pc/init.c (grub_lower_mem): removed variable + (grub_upper_mem): likewise + (grub_machine_init): don't use grub_upper_mem, + make grub_lower_mem local + * loader/i386/bsd.c (grub_openbsd_boot): use grub_mmap_get_lower, + grub_mmap_iterate and grub_mmap_get_upper + (grub_netbsd_boot): use grub_mmap_get_lower and grub_mmap_get_upper + 2009-04-06 Vladimir Serbinenko Preboot hooks support diff --git a/conf/i386-coreboot.rmk b/conf/i386-coreboot.rmk index bc500d9..554463f 100644 --- a/conf/i386-coreboot.rmk +++ b/conf/i386-coreboot.rmk @@ -102,7 +102,13 @@ pkglib_MODULES = linux.mod normal.mod multiboot.mod \ aout.mod play.mod serial.mod ata.mod \ memdisk.mod pci.mod lspci.mod reboot.mod \ halt.mod datetime.mod date.mod datehook.mod \ - lsmmap.mod + lsmmap.mod mmap.mod + +# For mmap.mod. +mmap_mod_SOURCES = mmap/mmap.c mmap/i386/uppermem.c +mmap_mod_CFLAGS = $(COMMON_CFLAGS) +mmap_mod_LDFLAGS = $(COMMON_LDFLAGS) +mmap_mod_ASFLAGS = $(COMMON_ASFLAGS) # For linux.mod. linux_mod_SOURCES = loader/i386/linux.c diff --git a/conf/i386-ieee1275.rmk b/conf/i386-ieee1275.rmk index bbd6c09..9c0e4bc 100644 --- a/conf/i386-ieee1275.rmk +++ b/conf/i386-ieee1275.rmk @@ -103,7 +103,13 @@ grub_install_SOURCES = util/ieee1275/grub-install.in pkglib_MODULES = normal.mod halt.mod reboot.mod suspend.mod \ multiboot.mod aout.mod serial.mod linux.mod \ nand.mod memdisk.mod pci.mod lspci.mod datetime.mod \ - date.mod datehook.mod lsmmap.mod + date.mod datehook.mod lsmmap.mod mmap.mod + +# For mmap.mod. +mmap_mod_SOURCES = mmap/mmap.c mmap/i386/uppermem.c +mmap_mod_CFLAGS = $(COMMON_CFLAGS) +mmap_mod_LDFLAGS = $(COMMON_LDFLAGS) +mmap_mod_ASFLAGS = $(COMMON_ASFLAGS) # # Only arch dependant part of normal.mod will be here. Common part for diff --git a/conf/i386-pc.rmk b/conf/i386-pc.rmk index fdb43df..178974c 100644 --- a/conf/i386-pc.rmk +++ b/conf/i386-pc.rmk @@ -175,7 +175,15 @@ pkglib_MODULES = biosdisk.mod chain.mod normal.mod \ ata.mod vga.mod memdisk.mod pci.mod lspci.mod \ aout.mod bsd.mod pxe.mod pxecmd.mod datetime.mod date.mod \ datehook.mod lsmmap.mod ata_pthru.mod hdparm.mod \ - usb.mod uhci.mod ohci.mod usbtest.mod usbms.mod usb_keyboard.mod + usb.mod uhci.mod ohci.mod usbtest.mod usbms.mod usb_keyboard.mod \ + mmap.mod + +# For mmap.mod. +mmap_mod_SOURCES = mmap/mmap.c mmap/i386/uppermem.c mmap/i386/pc/mmap.c \ + mmap/i386/pc/mmap_helper.S +mmap_mod_CFLAGS = $(COMMON_CFLAGS) +mmap_mod_LDFLAGS = $(COMMON_LDFLAGS) +mmap_mod_ASFLAGS = $(COMMON_ASFLAGS) # For biosdisk.mod. biosdisk_mod_SOURCES = disk/i386/pc/biosdisk.c diff --git a/include/grub/i386/bsd.h b/include/grub/i386/bsd.h index f50f18e..78fae79 100644 --- a/include/grub/i386/bsd.h +++ b/include/grub/i386/bsd.h @@ -148,6 +148,8 @@ struct grub_openbsd_bios_mmap { grub_uint64_t addr; grub_uint64_t len; +#define OPENBSD_MMAP_AVAILABLE 1 +#define OPENBSD_MMAP_RESERVED 2 grub_uint32_t type; }; diff --git a/include/grub/i386/pc/memory.h b/include/grub/i386/pc/memory.h index 08e92a9..610c65a 100644 --- a/include/grub/i386/pc/memory.h +++ b/include/grub/i386/pc/memory.h @@ -25,6 +25,7 @@ #ifndef ASM_FILE #include #include +#include #endif /* The scratch buffer used in real mode code. */ @@ -79,12 +80,6 @@ #ifndef ASM_FILE -#ifndef GRUB_MACHINE_IEEE1275 -extern grub_size_t EXPORT_VAR(grub_lower_mem); -#endif - -extern grub_size_t EXPORT_VAR(grub_upper_mem); - struct grub_machine_mmap_entry { grub_uint32_t size; @@ -92,12 +87,40 @@ struct grub_machine_mmap_entry grub_uint64_t len; #define GRUB_MACHINE_MEMORY_AVAILABLE 1 #define GRUB_MACHINE_MEMORY_RESERVED 2 +#define GRUB_MACHINE_MEMORY_ACPI 3 +#define GRUB_MACHINE_MEMORY_NVS 4 +#define GRUB_MACHINE_MEMORY_MAX_TYPE 4 + /* This one is special: it's used internally but is never reported + by firmware. */ +#define GRUB_MACHINE_MEMORY_HOLE 5 + grub_uint32_t type; } __attribute__((packed)); grub_err_t EXPORT_FUNC(grub_machine_mmap_iterate) (int NESTED_FUNC_ATTR (*hook) (grub_uint64_t, grub_uint64_t, grub_uint32_t)); +grub_uint64_t grub_mmap_get_post64 (void); +grub_uint64_t grub_mmap_get_upper (void); +grub_uint64_t grub_mmap_get_lower (void); + +#ifdef GRUB_MACHINE_PCBIOS +grub_err_t grub_machine_mmap_register (grub_uint64_t start, grub_uint64_t size, + int type, int handle); +grub_err_t grub_machine_mmap_unregister (int handle); +#else +static inline grub_err_t grub_machine_mmap_register (grub_uint64_t start, + grub_uint64_t size, + int type, int handle) +{ + return GRUB_ERR_NONE; +} +static inline grub_err_t grub_machine_mmap_unregister (int handle) +{ + return GRUB_ERR_NONE; +} +#endif + #endif #endif /* ! GRUB_MEMORY_MACHINE_HEADER */ diff --git a/include/grub/memory.h b/include/grub/memory.h new file mode 100644 index 0000000..03a8516 --- /dev/null +++ b/include/grub/memory.h @@ -0,0 +1,34 @@ +/* memory.h - describe the memory map */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2002,2007,2008 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +#ifndef GRUB_MEMORY_HEADER +#define GRUB_MEMORY_HEADER 1 + +#include +#include + +grub_err_t +grub_mmap_iterate (int NESTED_FUNC_ATTR (*hook) (grub_uint64_t, + grub_uint64_t, grub_uint32_t)); +int +grub_mmap_register (grub_uint64_t start, grub_uint64_t size, int type); +grub_err_t +grub_mmap_unregister (int handle); + +#endif /* ! GRUB_MEMORY_HEADER */ diff --git a/include/grub/types.h b/include/grub/types.h index 8d51b66..faf2257 100644 --- a/include/grub/types.h +++ b/include/grub/types.h @@ -100,6 +100,16 @@ typedef grub_int32_t grub_ssize_t; # define LONG_MAX 2147483647UL #endif +#if GRUB_CPU_SIZEOF_VOID_P == 4 +#define UINT_TO_PTR(x) ((void*)(grub_uint32_t)(x)) +#define PTR_TO_UINT64(x) ((grub_uint64_t)(grub_uint32_t)(x)) +#define PTR_TO_UINT32(x) ((grub_uint32_t)(x)) +#else +#define UINT_TO_PTR(x) ((void*)(grub_uint64_t)(x)) +#define PTR_TO_UINT64(x) ((grub_uint64_t)(x)) +#define PTR_TO_UINT32(x) ((grub_uint32_t)(grub_uint64_t)(x)) +#endif + /* The type for representing a file offset. */ typedef grub_uint64_t grub_off_t; diff --git a/kern/i386/coreboot/init.c b/kern/i386/coreboot/init.c index 1348488..2f7e875 100644 --- a/kern/i386/coreboot/init.c +++ b/kern/i386/coreboot/init.c @@ -82,16 +82,11 @@ grub_machine_init (void) #if GRUB_CPU_SIZEOF_VOID_P == 4 /* Restrict ourselves to 32-bit memory space. */ if (addr > ULONG_MAX) - { - grub_upper_mem = ULONG_MAX; - return 0; - } + return 0; if (addr + size > ULONG_MAX) size = ULONG_MAX - addr; #endif - grub_upper_mem = grub_max (grub_upper_mem, addr + size); - if (type != GRUB_MACHINE_MEMORY_AVAILABLE) return 0; @@ -128,9 +123,6 @@ grub_machine_init (void) grub_machine_mmap_init (); grub_machine_mmap_iterate (heap_init); - /* This variable indicates size, not offset. */ - grub_upper_mem -= GRUB_MEMORY_MACHINE_UPPER_START; - grub_tsc_init (); } diff --git a/kern/i386/pc/init.c b/kern/i386/pc/init.c index 6191412..c64497e 100644 --- a/kern/i386/pc/init.c +++ b/kern/i386/pc/init.c @@ -45,7 +45,6 @@ static int num_regions; grub_addr_t grub_os_area_addr; grub_size_t grub_os_area_size; -grub_size_t grub_lower_mem, grub_upper_mem; void grub_arch_sync_caches (void *address __attribute__ ((unused)), @@ -133,6 +132,7 @@ void grub_machine_init (void) { int i; + int grub_lower_mem; /* Initialize the console as early as possible. */ grub_console_init (); @@ -197,7 +197,6 @@ grub_machine_init (void) { grub_size_t quarter = mem_regions[i].size >> 2; - grub_upper_mem = mem_regions[i].size; grub_os_area_addr = mem_regions[i].addr; grub_os_area_size = mem_regions[i].size - quarter; grub_mm_init_region ((void *) (grub_os_area_addr + grub_os_area_size), diff --git a/loader/i386/bsd.c b/loader/i386/bsd.c index 355cb3f..ea51aa2 100644 --- a/loader/i386/bsd.c +++ b/loader/i386/bsd.c @@ -313,30 +313,36 @@ static grub_err_t grub_openbsd_boot (void) { char *buf = (char *) GRUB_BSD_TEMP_BUFFER; - struct grub_machine_mmap_entry mmap; struct grub_openbsd_bios_mmap *pm; struct grub_openbsd_bootargs *pa; - grub_uint32_t bootdev, biosdev, unit, slice, part, cont; + grub_uint32_t bootdev, biosdev, unit, slice, part; + + auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t, grub_uint32_t); + int NESTED_FUNC_ATTR hook (grub_uint64_t addr, grub_uint64_t size, grub_uint32_t type) + { + pm->addr = addr; + pm->len = size; + + switch (type) + { + case GRUB_MACHINE_MEMORY_AVAILABLE: + pm->type = OPENBSD_MMAP_AVAILABLE; + break; + + default: + pm->type = OPENBSD_MMAP_RESERVED; + break; + } + pm++; + + return 0; + } pa = (struct grub_openbsd_bootargs *) buf; pa->ba_type = OPENBSD_BOOTARG_MMAP; pm = (struct grub_openbsd_bios_mmap *) (pa + 1); - cont = grub_get_mmap_entry (&mmap, 0); - if (mmap.size) - do - { - pm->addr = mmap.addr; - pm->len = mmap.len; - pm->type = mmap.type; - pm++; - - if (!cont) - break; - - cont = grub_get_mmap_entry (&mmap, cont); - } - while (mmap.size); + grub_mmap_iterate (hook); pa->ba_size = (char *) pm - (char *) pa; pa->ba_next = (struct grub_openbsd_bootargs *) pm; @@ -349,7 +355,8 @@ grub_openbsd_boot (void) (part << OPENBSD_B_PARTSHIFT)); grub_unix_real_boot (entry, bootflags, bootdev, OPENBSD_BOOTARG_APIVER, - 0, grub_upper_mem >> 10, grub_lower_mem >> 10, + 0, grub_mmap_get_upper () >> 10, + grub_mmap_get_lower () >> 10, (char *) pa - buf, buf); /* Not reached. */ @@ -377,7 +384,8 @@ grub_netbsd_boot (void) bootinfo->bi_data[0] = rootdev; grub_unix_real_boot (entry, bootflags, 0, bootinfo, - 0, grub_upper_mem >> 10, grub_lower_mem >> 10); + 0, grub_mmap_get_upper () >> 10, + grub_mmap_get_lower () >> 10); /* Not reached. */ return GRUB_ERR_NONE; diff --git a/loader/i386/ieee1275/linux.c b/loader/i386/ieee1275/linux.c index 2f52880..a563577 100644 --- a/loader/i386/ieee1275/linux.c +++ b/loader/i386/ieee1275/linux.c @@ -100,7 +100,7 @@ grub_linux_boot (void) grub_memset ((char *) params, 0, GRUB_OFW_LINUX_CL_OFFSET); - params->alt_mem = grub_upper_mem >> 10; + params->alt_mem = grub_mmap_get_upper () >> 10; params->ext_mem = params->alt_mem; lh->cmd_line_ptr = (char *) diff --git a/loader/i386/linux.c b/loader/i386/linux.c index 01d10d5..aac9bf3 100644 --- a/loader/i386/linux.c +++ b/loader/i386/linux.c @@ -168,7 +168,7 @@ find_mmap_size (void) return 0; } - grub_machine_mmap_iterate (hook); + grub_mmap_iterate (hook); mmap_size = count * sizeof (struct grub_e820_mmap); @@ -237,7 +237,7 @@ allocate_pages (grub_size_t prot_size) return 0; } - grub_machine_mmap_iterate (hook); + grub_mmap_iterate (hook); if (! real_mode_mem) { grub_error (GRUB_ERR_OUT_OF_MEMORY, "cannot allocate real mode pages"); @@ -404,7 +404,7 @@ grub_linux_boot (void) } e820_num = 0; - grub_machine_mmap_iterate (hook); + grub_mmap_iterate (hook); params->mmap_size = e820_num; /* Hardware interrupts are not safe any longer. */ diff --git a/loader/i386/multiboot.c b/loader/i386/multiboot.c index 27042a5..d38590f 100644 --- a/loader/i386/multiboot.c +++ b/loader/i386/multiboot.c @@ -100,7 +100,7 @@ grub_get_multiboot_mmap_len (void) return 0; } - grub_machine_mmap_iterate (hook); + grub_mmap_iterate (hook); return count * sizeof (struct grub_multiboot_mmap_entry); } @@ -123,7 +123,7 @@ grub_fill_multiboot_mmap (struct grub_multiboot_mmap_entry *first_entry) return 0; } - grub_machine_mmap_iterate (hook); + grub_mmap_iterate (hook); } #define MULTIBOOT_LOAD_ELF64 @@ -342,8 +342,8 @@ grub_multiboot (int argc, char *argv[]) grub_multiboot_payload_entry_offset); /* Convert from bytes to kilobytes. */ - mbi->mem_lower = grub_lower_mem / 1024; - mbi->mem_upper = grub_upper_mem / 1024; + mbi->mem_lower = grub_mmap_get_lower () / 1024; + mbi->mem_upper = grub_mmap_get_upper () / 1024; mbi->flags |= MULTIBOOT_INFO_MEMORY; cmdline = p = cmdline_addr (grub_multiboot_payload_orig); diff --git a/loader/i386/pc/linux.c b/loader/i386/pc/linux.c index 8ff97f4..34a4ebc 100644 --- a/loader/i386/pc/linux.c +++ b/loader/i386/pc/linux.c @@ -108,8 +108,9 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)), lh.type_of_loader = GRUB_LINUX_BOOT_LOADER_TYPE; /* Put the real mode part at as a high location as possible. */ - grub_linux_real_addr = (char *) (grub_lower_mem - - GRUB_LINUX_SETUP_MOVE_SIZE); + grub_linux_real_addr + = (char *) UINT_TO_PTR (grub_mmap_get_lower () + - GRUB_LINUX_SETUP_MOVE_SIZE); /* But it must not exceed the traditional area. */ if (grub_linux_real_addr > (char *) GRUB_LINUX_OLD_REAL_MODE_ADDR) grub_linux_real_addr = (char *) GRUB_LINUX_OLD_REAL_MODE_ADDR; @@ -159,12 +160,12 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)), } if (grub_linux_real_addr + GRUB_LINUX_SETUP_MOVE_SIZE - > (char *) grub_lower_mem) + > (char *) UINT_TO_PTR (grub_mmap_get_lower ())) { grub_error (GRUB_ERR_OUT_OF_RANGE, "too small lower memory (0x%x > 0x%x)", - grub_linux_real_addr + GRUB_LINUX_SETUP_MOVE_SIZE, - (char *) grub_lower_mem); + grub_linux_real_addr + GRUB_LINUX_SETUP_MOVE_SIZE, + (int) grub_mmap_get_lower ()); goto fail; } diff --git a/mmap/i386/pc/mmap.c b/mmap/i386/pc/mmap.c new file mode 100644 index 0000000..3b45de4 --- /dev/null +++ b/mmap/i386/pc/mmap.c @@ -0,0 +1,240 @@ +/* Mmap management. */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2009 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +#include +#include +#include +#include +#include + +#define min(a,b) (((a) < (b)) ? (a) : (b)) + +static void *hooktarget = 0; + +extern grub_uint8_t grub_machine_mmaphook_start; +extern grub_uint8_t grub_machine_mmaphook_end; +extern grub_uint8_t grub_machine_mmaphook_int12; +extern grub_uint8_t grub_machine_mmaphook_int15; + +static grub_uint16_t grub_machine_mmaphook_int12offset = 0; +static grub_uint16_t grub_machine_mmaphook_int12segment = 0; +extern grub_uint16_t grub_machine_mmaphook_int15offset; +extern grub_uint16_t grub_machine_mmaphook_int15segment; + +extern grub_uint16_t grub_machine_mmaphook_mmap_num; +extern grub_uint16_t grub_machine_mmaphook_kblow; +extern grub_uint16_t grub_machine_mmaphook_kbin16mb; +extern grub_uint16_t grub_machine_mmaphook_64kbin4gb; + +struct grub_e820_mmap_entry +{ + grub_uint64_t addr; + grub_uint64_t len; + grub_uint32_t type; +} __attribute__((packed)); + + +static grub_err_t +preboot (int noreturn __attribute__ ((unused))) +{ + struct grub_e820_mmap_entry *hookmmap, *hookmmapcur; + auto int NESTED_FUNC_ATTR fill_hook (grub_uint64_t, grub_uint64_t, + grub_uint32_t); + int NESTED_FUNC_ATTR fill_hook (grub_uint64_t addr, grub_uint64_t size, + grub_uint32_t type) + { + grub_dprintf ("mmap", "mmap chunk %llx-%llx:%x\n", addr, addr + size, type); + hookmmapcur->addr = addr; + hookmmapcur->len = size; + hookmmapcur->type = type; + hookmmapcur++; + return 0; + } + + if (! hooktarget) + return grub_error (GRUB_ERR_OUT_OF_MEMORY, + "no space is allocated for memory hook"); + + grub_dprintf ("mmap", "installing preboot handlers\n"); + + hookmmapcur = hookmmap = (struct grub_e820_mmap_entry *) + ((grub_uint8_t *) hooktarget + (&grub_machine_mmaphook_end + - &grub_machine_mmaphook_start)); + + grub_mmap_iterate (fill_hook); + grub_machine_mmaphook_mmap_num = hookmmapcur - hookmmap; + + grub_machine_mmaphook_kblow = grub_mmap_get_lower () >> 10; + grub_machine_mmaphook_kbin16mb + = min (grub_mmap_get_upper (),0x3f00000ULL) >> 10; + grub_machine_mmaphook_64kbin4gb + = min (grub_mmap_get_post64 (), 0xfc000000ULL) >> 16; + + /* Correct BDA. */ + *((grub_uint16_t *) 0x413) = grub_mmap_get_lower () >> 10; + + /* Save old interrupt handlers. */ + grub_machine_mmaphook_int12offset = *((grub_uint16_t *) 0x48); + grub_machine_mmaphook_int12segment = *((grub_uint16_t *) 0x4a); + grub_machine_mmaphook_int15offset = *((grub_uint16_t *) 0x54); + grub_machine_mmaphook_int15segment = *((grub_uint16_t *) 0x56); + + grub_dprintf ("mmap", "hooktarget = %p\n", hooktarget); + + /* Install the interrupt handlers. */ + grub_memcpy (hooktarget, &grub_machine_mmaphook_start, + &grub_machine_mmaphook_end - &grub_machine_mmaphook_start); + + *((grub_uint16_t *) 0x4a) = PTR_TO_UINT32 (hooktarget) >> 4; + *((grub_uint16_t *) 0x56) = PTR_TO_UINT32 (hooktarget) >> 4; + *((grub_uint16_t *) 0x48) = &grub_machine_mmaphook_int12 + - &grub_machine_mmaphook_start; + *((grub_uint16_t *) 0x54) = &grub_machine_mmaphook_int15 + - &grub_machine_mmaphook_start; + + return GRUB_ERR_NONE; +} + +static grub_err_t +preboot_rest (void) +{ + /* Restore old interrupt handlers. */ + *((grub_uint16_t *) 0x48) = grub_machine_mmaphook_int12offset; + *((grub_uint16_t *) 0x4a) = grub_machine_mmaphook_int12segment; + *((grub_uint16_t *) 0x54) = grub_machine_mmaphook_int15offset; + *((grub_uint16_t *) 0x56) = grub_machine_mmaphook_int15segment; + + return GRUB_ERR_NONE; +} + +static grub_err_t +malloc_hook (void) +{ + static int reentry = 0; + static int mmapregion = 0; + static int slots_available = 0; + int hooksize; + int regcount = 0; + grub_uint64_t highestlow = 0; + auto int NESTED_FUNC_ATTR count_hook (grub_uint64_t, grub_uint64_t, + grub_uint32_t); + int NESTED_FUNC_ATTR count_hook (grub_uint64_t addr __attribute__ ((unused)), + grub_uint64_t size __attribute__ ((unused)), + grub_uint32_t type __attribute__ ((unused))) + { + regcount++; + return 0; + } + + auto int NESTED_FUNC_ATTR find_hook (grub_uint64_t, grub_uint64_t, + grub_uint32_t); + int NESTED_FUNC_ATTR find_hook (grub_uint64_t start, grub_uint64_t size, + grub_uint32_t type) + { + grub_uint64_t end = start + size; + if (type != GRUB_MACHINE_MEMORY_AVAILABLE) + return 0; + if (end > 0x100000) + end = 0x100000; + if (end > start + hooksize + && highestlow < ((end - hooksize) & (~0xf)) ) + highestlow = (end - hooksize) & (~0xf); + return 0; + } + + if (reentry) + return GRUB_ERR_NONE; + + grub_dprintf ("mmap", "registering\n"); + + grub_mmap_iterate (count_hook); + + /* Mapping hook itself may introduce up to 2 additional regions. */ + regcount += 2; + + if (regcount <= slots_available) + return GRUB_ERR_NONE; + + if (mmapregion) + { + grub_mmap_unregister (mmapregion); + mmapregion = 0; + hooktarget = 0; + } + + hooksize = &grub_machine_mmaphook_end - &grub_machine_mmaphook_start + + regcount * sizeof (struct grub_e820_mmap_entry); + /* Allocate an integer number of KiB. */ + hooksize = ((hooksize - 1) | 0x3ff) + 1; + slots_available = (hooksize - (&grub_machine_mmaphook_end + - &grub_machine_mmaphook_start)) + / sizeof (struct grub_e820_mmap_entry); + + /* FIXME: use low-memory mm allocation once it's available. */ + grub_mmap_iterate (find_hook); + if (! highestlow) + { + slots_available = 0; + hooktarget = 0; + return grub_error (GRUB_ERR_OUT_OF_MEMORY, "No space for mmap hook"); + } + + hooktarget = UINT_TO_PTR (highestlow); + + reentry = 1; + mmapregion = grub_mmap_register (PTR_TO_UINT64 (hooktarget), hooksize, + GRUB_MACHINE_MEMORY_RESERVED); + reentry = 0; + if (! mmapregion) + { + slots_available = 0; + hooktarget = 0; + return grub_errno; + } + return GRUB_ERR_NONE; +} + +grub_err_t +grub_machine_mmap_register (grub_uint64_t start __attribute__ ((unused)), + grub_uint64_t size __attribute__ ((unused)), + int type __attribute__ ((unused)), + int handle __attribute__ ((unused))) +{ + grub_err_t err; + static void *preb_handle = 0; + + if ((err = malloc_hook ())) + return err; + + if (! preb_handle) + { + grub_dprintf ("mmap", "adding preboot\n"); + preb_handle = grub_loader_register_preboot_hook (preboot, preboot_rest, + -10); + if (! preb_handle) + return grub_errno; + } + return GRUB_ERR_NONE; +} + +grub_err_t +grub_machine_mmap_unregister (int handle __attribute__ ((unused))) +{ + return GRUB_ERR_NONE; +} diff --git a/mmap/i386/pc/mmap_helper.S b/mmap/i386/pc/mmap_helper.S new file mode 100644 index 0000000..ab7c0d2 --- /dev/null +++ b/mmap/i386/pc/mmap_helper.S @@ -0,0 +1,122 @@ +/* Mmap management. */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2009 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +#include + +#define DS(x) ((x) - segstart) + +segstart: +VARIABLE(grub_machine_mmaphook_start) + .code16 +VARIABLE(grub_machine_mmaphook_int12) + push %ds + push %cs + pop %ds + movw DS (EXT_C (grub_machine_mmaphook_kblow)), %ax + pop %ds + iret + +VARIABLE(grub_machine_mmaphook_int15) + pushf + cmpw $0xe801, %ax + jz e801 + cmpw $0xe820, %ax + jz e820 + cmpb $0x88, %ah + jz h88 + popf + /* ljmp */ + .byte 0xea +VARIABLE (grub_machine_mmaphook_int15offset) + .word 0 +VARIABLE (grub_machine_mmaphook_int15segment) + .word 0 + +e801: + popf + push %ds + push %cs + pop %ds + movw DS (EXT_C (grub_machine_mmaphook_kbin16mb)), %ax + movw DS (EXT_C (grub_machine_mmaphook_64kbin4gb)), %bx + movw %ax, %cx + movw %bx, %dx + pop %ds + clc + iret + +h88: + popf + push %ds + push %cs + pop %ds + movw DS (EXT_C (grub_machine_mmaphook_kbin16mb)), %ax + pop %ds + clc + iret + +e820: + popf + push %ds + push %cs + pop %ds + cmpw $20, %cx + jb errexit + cmpw DS (EXT_C (grub_machine_mmaphook_mmap_num)), %bx + jae errexit + cmp $0x534d4150, %edx + jne errexit + push %si + push %di + movw $20, %cx + movw $(DS(mmaphook_mmap)), %si + mov %bx, %ax + imul $20, %ax + add %ax, %si + rep movsb + pop %di + pop %si + movl $20, %ecx + inc %bx + cmpw DS(EXT_C(grub_machine_mmaphook_mmap_num)), %bx + jb noclean + xor %bx, %bx +noclean: + mov $0x534d4150, %eax + pop %ds + clc + iret +errexit: + mov $0x534d4150, %eax + pop %ds + stc + xor %bx, %bx + iret + +VARIABLE(grub_machine_mmaphook_mmap_num) + .word 0 +VARIABLE(grub_machine_mmaphook_kblow) + .word 0 +VARIABLE (grub_machine_mmaphook_kbin16mb) + .word 0 +VARIABLE (grub_machine_mmaphook_64kbin4gb) + .word 0 +mmaphook_mmap: + /* Memory map is placed just after the interrupt handlers. */ +VARIABLE(grub_machine_mmaphook_end) diff --git a/mmap/i386/uppermem.c b/mmap/i386/uppermem.c new file mode 100644 index 0000000..1fb339d --- /dev/null +++ b/mmap/i386/uppermem.c @@ -0,0 +1,85 @@ +/* Compute amount of lower and upper memory till the first hole. */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2009 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +#include +#include +#include + +grub_uint64_t +grub_mmap_get_lower (void) +{ + grub_uint64_t lower = 0; + + auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t, grub_uint32_t); + int NESTED_FUNC_ATTR hook (grub_uint64_t addr, grub_uint64_t size, + grub_uint32_t type) + { + if (type != GRUB_MACHINE_MEMORY_AVAILABLE) + return 0; + if (addr == 0) + lower = size; + return 0; + } + + grub_mmap_iterate (hook); + if (lower > 0x100000) + lower = 0x100000; + return lower; +} + +grub_uint64_t +grub_mmap_get_upper (void) +{ + grub_uint64_t upper = 0; + + auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t, grub_uint32_t); + int NESTED_FUNC_ATTR hook (grub_uint64_t addr, grub_uint64_t size, + grub_uint32_t type) + { + if (type != GRUB_MACHINE_MEMORY_AVAILABLE) + return 0; + if (addr <= 0x100000 && addr + size > 0x100000) + upper = addr + size - 0x100000; + return 0; + } + + grub_mmap_iterate (hook); + return upper; +} + +/* Count the continous bytes after 64 MiB. */ +grub_uint64_t +grub_mmap_get_post64 (void) +{ + grub_uint64_t post64 = 0; + + auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t, grub_uint32_t); + int NESTED_FUNC_ATTR hook (grub_uint64_t addr, grub_uint64_t size, + grub_uint32_t type) + { + if (type != GRUB_MACHINE_MEMORY_AVAILABLE) + return 0; + if (addr <= 0x4000000 && addr + size > 0x4000000) + post64 = addr + size - 0x4000000; + return 0; + } + + grub_mmap_iterate (hook); + return post64; +} diff --git a/mmap/mmap.c b/mmap/mmap.c new file mode 100644 index 0000000..01480ff --- /dev/null +++ b/mmap/mmap.c @@ -0,0 +1,364 @@ +/* Mmap management. */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2009 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +#include +#include +#include +#include +#include +#include +#include + +#ifndef GRUB_MMAP_REGISTER_BY_FIRMWARE + +struct region +{ + struct region *next; + grub_uint64_t start; + grub_uint64_t end; + int type; + int handle; +}; + +static struct region *overlays = 0; +static int curhandle = 1; + +grub_err_t +grub_mmap_iterate (int NESTED_FUNC_ATTR (*hook) (grub_uint64_t, + grub_uint64_t, grub_uint32_t)) +{ + /* This function resolves overlapping regions and sorts the memory map. + It uses scanline (sweeping) algorithm. + */ + /* If same page is used by multiple types it's resolved + according to priority: + 1 - free memory + 2 - memory usable by firmware-aware code + 3 - unusable memory + 4 - a range deliberately empty + */ + int priority[GRUB_MACHINE_MEMORY_MAX_TYPE + 2] = + { +#ifdef GRUB_MACHINE_MEMORY_AVAILABLE + [GRUB_MACHINE_MEMORY_AVAILABLE] = 1, +#endif +#ifdef GRUB_MACHINE_MEMORY_RESERVED + [GRUB_MACHINE_MEMORY_RESERVED] = 3, +#endif +#ifdef GRUB_MACHINE_MEMORY_ACPI + [GRUB_MACHINE_MEMORY_ACPI] = 2, +#endif +#ifdef GRUB_MACHINE_MEMORY_NVS + [GRUB_MACHINE_MEMORY_NVS] = 3, +#endif + [GRUB_MACHINE_MEMORY_HOLE] = 4, + }; + + int i, k, done; + + /* Scanline events. */ + struct grub_mmap_scan + { + /* At which memory address. */ + grub_uint64_t pos; + /* 0 = region starts, 1 = region ends. */ + int type; + /* Which type of memory region? */ + int memtype; + }; + struct grub_mmap_scan *scanline_events; + struct grub_mmap_scan t; + + /* Previous scanline event. */ + grub_uint64_t lastaddr; + int lasttype; + /* Current scanline event. */ + int curtype; + /* How many regions of given type overlap at current location? */ + int present[GRUB_MACHINE_MEMORY_MAX_TYPE + 2]; + /* Number of mmap chunks. */ + int mmap_num; + + struct region *cur; + + auto int NESTED_FUNC_ATTR count_hook (grub_uint64_t, grub_uint64_t, + grub_uint32_t); + int NESTED_FUNC_ATTR count_hook (grub_uint64_t addr __attribute__ ((unused)), + grub_uint64_t size __attribute__ ((unused)), + grub_uint32_t type __attribute__ ((unused))) + { + mmap_num++; + return 0; + } + + auto int NESTED_FUNC_ATTR fill_hook (grub_uint64_t, grub_uint64_t, + grub_uint32_t); + int NESTED_FUNC_ATTR fill_hook (grub_uint64_t addr, + grub_uint64_t size, + grub_uint32_t type) + { + scanline_events[i].pos = addr; + scanline_events[i].type = 0; + if (type <= GRUB_MACHINE_MEMORY_MAX_TYPE && priority[type]) + scanline_events[i].memtype = type; + else + { + grub_dprintf ("mmap", "Unknown memory type %d. Assuming unusable\n", + type); + scanline_events[i].memtype = GRUB_MACHINE_MEMORY_RESERVED; + } + i++; + + scanline_events[i].pos = addr + size; + scanline_events[i].type = 1; + scanline_events[i].memtype = scanline_events[i - 1].memtype; + i++; + + return 0; + } + + mmap_num = 0; + for (cur = overlays; cur; cur = cur->next) + mmap_num++; + grub_machine_mmap_iterate (count_hook); + + /* Initialize variables. */ + grub_memset (present, 0, sizeof (present)); + scanline_events = (struct grub_mmap_scan *) + grub_malloc (sizeof (struct grub_mmap_scan) * 2 * mmap_num); + + if (! scanline_events) + { + return grub_error (GRUB_ERR_OUT_OF_MEMORY, + "couldn't allocate space for new memory map"); + } + + /* Register scanline events. */ + for (cur = overlays, i = 0; cur; cur = cur->next) + { + scanline_events[i].pos = cur->start; + scanline_events[i].type = 0; + if (cur->type == GRUB_MACHINE_MEMORY_HOLE + || (cur->type >= 0 && cur->type <= GRUB_MACHINE_MEMORY_MAX_TYPE + && priority[cur->type])) + scanline_events[i].memtype = cur->type; + else + scanline_events[i].memtype = GRUB_MACHINE_MEMORY_RESERVED; + i++; + + scanline_events[i].pos = cur->end; + scanline_events[i].type = 1; + scanline_events[i].memtype = scanline_events[i - 1].memtype; + i++; + } + + grub_machine_mmap_iterate (fill_hook); + + /* Primitive bubble sort. It has complexity O(n^2) but since we're + unlikely to have more than 100 chunks it's probably one of the + fastest for one purpose. */ + done = 1; + while (done) + { + done = 0; + for (i = 0; i < 2 * mmap_num - 1; i++) + if (scanline_events[i + 1].pos < scanline_events[i].pos + || (scanline_events[i + 1].pos == scanline_events[i].pos + && scanline_events[i + 1].type == 0 + && scanline_events[i].type == 1)) + { + t = scanline_events[i + 1]; + scanline_events[i + 1] = scanline_events[i]; + scanline_events[i] = t; + done = 1; + } + } + + lastaddr = scanline_events[0].pos; + lasttype = scanline_events[0].memtype; + for (i = 0; i < 2 * mmap_num; i++) + { + /* Process event. */ + if (scanline_events[i].type) + present[scanline_events[i].memtype]--; + else + present[scanline_events[i].memtype]++; + + /* Determine current region type. */ + curtype = -1; + for (k = 0; k <= GRUB_MACHINE_MEMORY_MAX_TYPE + 1; k++) + if (present[k] && (curtype == -1 || priority[k] > priority[curtype])) + curtype = k; + + /* Anounce region to the hook if necessary. */ + if ((curtype == -1 || curtype != lasttype) + && lastaddr != scanline_events[i].pos + && lasttype != -1 + && lasttype != GRUB_MACHINE_MEMORY_HOLE + && hook (lastaddr, scanline_events[i].pos - lastaddr, lasttype)) + { + grub_free (scanline_events); + return GRUB_ERR_NONE; + } + + /* Update last values if necessary. */ + if (curtype == -1 || curtype != lasttype) + { + lasttype = curtype; + lastaddr = scanline_events[i].pos; + } + } + + grub_free (scanline_events); + return GRUB_ERR_NONE; +} + +int +grub_mmap_register (grub_uint64_t start, grub_uint64_t size, int type) +{ + struct region *cur; + + grub_dprintf ("mmap", "registering\n"); + + cur = (struct region *) grub_malloc (sizeof (struct region)); + if (! cur) + { + grub_error (GRUB_ERR_OUT_OF_MEMORY, + "couldn't allocate memory map overlay"); + return 0; + } + + cur->next = overlays; + cur->start = start; + cur->end = start + size; + cur->type = type; + cur->handle = curhandle++; + overlays = cur; + + if (grub_machine_mmap_register (start, size, type, curhandle)) + { + overlays = cur->next; + grub_free (cur); + return 0; + } + + return cur->handle; +} + +grub_err_t +grub_mmap_unregister (int handle) +{ + struct region *cur, *prev; + + for (cur = overlays, prev = 0; cur; prev= cur, cur = cur->next) + if (handle == cur->handle) + { + grub_err_t err; + if ((err = grub_machine_mmap_unregister (handle))) + return err; + + if (prev) + prev->next = cur->next; + else + overlays = cur->next; + grub_free (cur); + return GRUB_ERR_NONE; + } + return grub_error (GRUB_ERR_BAD_ARGUMENT, "mmap overlay not found"); +} + +#endif /* ! GRUB_MMAP_REGISTER_BY_FIRMWARE */ + +#define CHUNK_SIZE 0x400 + +static grub_err_t +grub_cmd_badram (grub_command_t cmd __attribute__ ((unused)), + int argc, char **args) +{ + char * str; + grub_uint64_t badaddr, badmask; + + auto int NESTED_FUNC_ATTR hook (grub_uint64_t, grub_uint64_t, grub_uint32_t); + int NESTED_FUNC_ATTR hook (grub_uint64_t addr, + grub_uint64_t size, + grub_uint32_t type __attribute__ ((unused))) + { + grub_uint64_t start; + grub_dprintf ("badram", "hook %llx+%llx\n", addr,size); + + /* FIXME: use more efficient algorithm. */ + for (start = (addr & ~(CHUNK_SIZE - 1)); start < addr + size; + start += CHUNK_SIZE) + if (((start ^ badaddr) & badmask) == 0) + { + grub_dprintf ("badram", "%llx is a bad boy\n", start); + grub_mmap_register (start, CHUNK_SIZE, GRUB_MACHINE_MEMORY_HOLE); + } + return 0; + } + + if (argc != 1) + return grub_error (GRUB_ERR_BAD_ARGUMENT, "badram string required"); + + grub_dprintf ("badram", "executing badram\n"); + + str = args[0]; + + while (1) + { + /* Parse address and mask. */ + badaddr = grub_strtoull (str, &str, 16); + if (*str == ',') + str++; + badmask = grub_strtoull (str, &str, 16); + if (*str == ',') + str++; + + if (grub_errno == GRUB_ERR_BAD_NUMBER) + { + grub_errno = 0; + return GRUB_ERR_NONE; + } + + /* When part of a page is tainted, we discard the whole of it. There's + no point in providing sub-page chunks. */ + badmask &= ~(CHUNK_SIZE - 1); + + grub_dprintf ("badram", "badram %llx:%llx\n", badaddr, badmask); + + grub_mmap_iterate (hook); + } +} + +static grub_command_t cmd; + + +GRUB_MOD_INIT(mmap) +{ + (void) mod; /* To stop warning. */ + cmd = grub_register_command ("badram", grub_cmd_badram, + "badram ADDR1,MASK1[,ADDR2,MASK2[,...]]", + "declare memory regions as badram"); +} + +GRUB_MOD_FINI(mmap) +{ + grub_unregister_command (cmd); +} + --------------020601080109050907050704--