From b8f364bece63ad8c8e0a015f4485ad59104b3209 Mon Sep 17 00:00:00 2001 From: Thomas Heijligen Date: Tue, 14 Dec 2021 17:52:30 +0100 Subject: physmap: rename to hwaccess_physmap, create own header Line up physmap with the other hwaccess related code. Change-Id: Ieba6f4e94cfc3e668fcb8b3c978de5908aed2592 Signed-off-by: Thomas Heijligen Reviewed-on: https://review.coreboot.org/c/flashrom/+/60113 Tested-by: build bot (Jenkins) Reviewed-by: Nico Huber --- Makefile | 2 +- atapromise.c | 1 + cbtable.c | 1 + chipset_enable.c | 1 + dmi.c | 1 + drkaiser.c | 1 + flashrom.c | 1 + gfxnvidia.c | 1 + hwaccess_physmap.c | 363 ++++++++++++++++++++++++++++++++++++++++++++++++++++ hwaccess_physmap.h | 27 ++++ ichspi.c | 1 + internal.c | 1 + it8212.c | 1 + it85spi.c | 1 + mcp6x_spi.c | 1 + meson.build | 2 +- nicintel.c | 1 + nicintel_eeprom.c | 1 + nicintel_spi.c | 1 + ogp_spi.c | 1 + physmap.c | 364 ----------------------------------------------------- programmer.h | 8 -- satamv.c | 1 + satasii.c | 1 + sb600spi.c | 1 + 25 files changed, 411 insertions(+), 374 deletions(-) create mode 100644 hwaccess_physmap.c create mode 100644 hwaccess_physmap.h delete mode 100644 physmap.c diff --git a/Makefile b/Makefile index 04816fae0..c985ae020 100644 --- a/Makefile +++ b/Makefile @@ -802,7 +802,7 @@ endif ifneq ($(NEED_RAW_ACCESS), ) # Raw memory, MSR or PCI port I/O access. FEATURE_CFLAGS += -D'NEED_RAW_ACCESS=1' -PROGRAMMER_OBJS += physmap.o hwaccess.o +PROGRAMMER_OBJS += hwaccess.o hwaccess_physmap.o ifeq ($(ARCH), x86) FEATURE_CFLAGS += -D'__FLASHROM_HAVE_OUTB__=1' diff --git a/atapromise.c b/atapromise.c index 56abc26b4..fb3adcb0a 100644 --- a/atapromise.c +++ b/atapromise.c @@ -20,6 +20,7 @@ #include "programmer.h" #include "hwaccess.h" #include "hwaccess_x86_io.h" +#include "hwaccess_physmap.h" #include "platform/pci.h" #define MAX_ROM_DECODE (32 * 1024) diff --git a/cbtable.c b/cbtable.c index d50a0cfc5..2b339d533 100644 --- a/cbtable.c +++ b/cbtable.c @@ -26,6 +26,7 @@ #include "flash.h" #include "programmer.h" #include "coreboot_tables.h" +#include "hwaccess_physmap.h" static char *cb_vendor = NULL, *cb_model = NULL; diff --git a/chipset_enable.c b/chipset_enable.c index 22af6810a..e216722da 100644 --- a/chipset_enable.c +++ b/chipset_enable.c @@ -36,6 +36,7 @@ #include "hwaccess.h" #include "hwaccess_x86_io.h" #include "hwaccess_x86_msr.h" +#include "hwaccess_physmap.h" #include "platform/pci.h" #define NOT_DONE_YET 1 diff --git a/dmi.c b/dmi.c index d2e149d26..df918f9ed 100644 --- a/dmi.c +++ b/dmi.c @@ -32,6 +32,7 @@ #include "flash.h" #include "hwaccess.h" +#include "hwaccess_physmap.h" #include "programmer.h" /* Enable SMBIOS decoding. Currently legacy DMI decoding is enough. */ diff --git a/drkaiser.c b/drkaiser.c index 565a45ed6..0930c1fff 100644 --- a/drkaiser.c +++ b/drkaiser.c @@ -19,6 +19,7 @@ #include "programmer.h" #include "hwaccess.h" #include "hwaccess_x86_io.h" +#include "hwaccess_physmap.h" #include "platform/pci.h" #define PCI_VENDOR_ID_DRKAISER 0x1803 diff --git a/flashrom.c b/flashrom.c index b62d38c30..73ebab57c 100644 --- a/flashrom.c +++ b/flashrom.c @@ -38,6 +38,7 @@ #include "flashchips.h" #include "programmer.h" #include "hwaccess.h" +#include "hwaccess_physmap.h" #include "chipdrivers.h" const char flashrom_version[] = FLASHROM_VERSION; diff --git a/gfxnvidia.c b/gfxnvidia.c index 0d3ef39e1..30c94b905 100644 --- a/gfxnvidia.c +++ b/gfxnvidia.c @@ -20,6 +20,7 @@ #include "programmer.h" #include "hwaccess.h" #include "hwaccess_x86_io.h" +#include "hwaccess_physmap.h" #include "platform/pci.h" #define PCI_VENDOR_ID_NVIDIA 0x10de diff --git a/hwaccess_physmap.c b/hwaccess_physmap.c new file mode 100644 index 000000000..dcc6ed777 --- /dev/null +++ b/hwaccess_physmap.c @@ -0,0 +1,363 @@ +/* + * This file is part of the flashrom project. + * + * Copyright (C) 2009 Peter Stuge + * Copyright (C) 2009 coresystems GmbH + * Copyright (C) 2010 Carl-Daniel Hailfinger + * Copyright (C) 2010 Rudolf Marek + * + * This program 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; version 2 of the License. + * + * This program 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. + */ + +#include +#include +#include +#include +#include +#include +#include "flash.h" +#include "hwaccess_physmap.h" + +#if !defined(__DJGPP__) && !defined(__LIBPAYLOAD__) +/* No file access needed/possible to get mmap access permissions or access MSR. */ +#include +#include +#endif + +#ifdef __DJGPP__ +#include +#include +#include + +#define ONE_MEGABYTE (1024 * 1024) +#define MEM_DEV "dpmi" + +static void *realmem_map_aligned; + +static void *map_first_meg(uintptr_t phys_addr, size_t len) +{ + void *realmem_map; + size_t pagesize; + + if (realmem_map_aligned) + return realmem_map_aligned + phys_addr; + + /* valloc() from DJGPP 2.05 does not work properly */ + pagesize = getpagesize(); + + realmem_map = malloc(ONE_MEGABYTE + pagesize); + + if (!realmem_map) + return ERROR_PTR; + + realmem_map_aligned = (void *)(((size_t) realmem_map + + (pagesize - 1)) & ~(pagesize - 1)); + + if (__djgpp_map_physical_memory(realmem_map_aligned, ONE_MEGABYTE, 0)) { + free(realmem_map); + realmem_map_aligned = NULL; + return ERROR_PTR; + } + + return realmem_map_aligned + phys_addr; +} + +static void *sys_physmap(uintptr_t phys_addr, size_t len) +{ + int ret; + __dpmi_meminfo mi; + + /* Enable 4GB limit on DS descriptor. */ + if (!__djgpp_nearptr_enable()) + return ERROR_PTR; + + if ((phys_addr + len - 1) < ONE_MEGABYTE) { + /* We need to use another method to map first 1MB. */ + return map_first_meg(phys_addr, len); + } + + mi.address = phys_addr; + mi.size = len; + ret = __dpmi_physical_address_mapping(&mi); + + if (ret != 0) + return ERROR_PTR; + + return (void *) mi.address + __djgpp_conventional_base; +} + +#define sys_physmap_rw_uncached sys_physmap +#define sys_physmap_ro_cached sys_physmap + +static void sys_physunmap_unaligned(void *virt_addr, size_t len) +{ + __dpmi_meminfo mi; + + /* There is no known way to unmap the first 1 MB. The DPMI server will + * do this for us on exit. + */ + if ((virt_addr >= realmem_map_aligned) && + ((virt_addr + len) <= (realmem_map_aligned + ONE_MEGABYTE))) { + return; + } + + mi.address = (unsigned long) virt_addr; + __dpmi_free_physical_address_mapping(&mi); +} + +#elif defined(__LIBPAYLOAD__) +#include + +#define MEM_DEV "" + +void *sys_physmap(uintptr_t phys_addr, size_t len) +{ + return (void *)phys_to_virt(phys_addr); +} + +#define sys_physmap_rw_uncached sys_physmap +#define sys_physmap_ro_cached sys_physmap + +static void sys_physunmap_unaligned(void *virt_addr, size_t len) +{ +} +#elif defined(__MACH__) && defined(__APPLE__) + +#define MEM_DEV "DirectHW" + +static void *sys_physmap(uintptr_t phys_addr, size_t len) +{ + /* The short form of ?: is a GNU extension. + * FIXME: map_physical returns NULL both for errors and for success + * if the region is mapped at virtual address zero. If in doubt, report + * an error until a better interface exists. + */ + return map_physical(phys_addr, len) ? : ERROR_PTR; +} + +/* The OS X driver does not differentiate between mapping types. */ +#define sys_physmap_rw_uncached sys_physmap +#define sys_physmap_ro_cached sys_physmap + +static void sys_physunmap_unaligned(void *virt_addr, size_t len) +{ + unmap_physical(virt_addr, len); +} + +#else +#include + +#if defined (__sun) && (defined(__i386) || defined(__amd64)) +# define MEM_DEV "/dev/xsvc" +#else +# define MEM_DEV "/dev/mem" +#endif + +static int fd_mem = -1; +static int fd_mem_cached = -1; + +/* For MMIO access. Must be uncached, doesn't make sense to restrict to ro. */ +static void *sys_physmap_rw_uncached(uintptr_t phys_addr, size_t len) +{ + void *virt_addr; + + if (-1 == fd_mem) { + /* Open the memory device UNCACHED. Important for MMIO. */ + if (-1 == (fd_mem = open(MEM_DEV, O_RDWR | O_SYNC))) { + msg_perr("Critical error: open(" MEM_DEV "): %s\n", strerror(errno)); + return ERROR_PTR; + } + } + + virt_addr = mmap(NULL, len, PROT_WRITE | PROT_READ, MAP_SHARED, fd_mem, (off_t)phys_addr); + return MAP_FAILED == virt_addr ? ERROR_PTR : virt_addr; +} + +/* For reading DMI/coreboot/whatever tables. We should never write, and we + * do not care about caching. + */ +static void *sys_physmap_ro_cached(uintptr_t phys_addr, size_t len) +{ + void *virt_addr; + + if (-1 == fd_mem_cached) { + /* Open the memory device CACHED. */ + if (-1 == (fd_mem_cached = open(MEM_DEV, O_RDWR))) { + msg_perr("Critical error: open(" MEM_DEV "): %s\n", strerror(errno)); + return ERROR_PTR; + } + } + + virt_addr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd_mem_cached, (off_t)phys_addr); + return MAP_FAILED == virt_addr ? ERROR_PTR : virt_addr; +} + +static void sys_physunmap_unaligned(void *virt_addr, size_t len) +{ + munmap(virt_addr, len); +} +#endif + +#define PHYSM_RW 0 +#define PHYSM_RO 1 +#define PHYSM_NOCLEANUP 0 +#define PHYSM_CLEANUP 1 +#define PHYSM_EXACT 0 +#define PHYSM_ROUND 1 + +/* Round start to nearest page boundary below and set len so that the resulting address range ends at the lowest + * possible page boundary where the original address range is still entirely contained. It returns the + * difference between the rounded start address and the original start address. */ +static uintptr_t round_to_page_boundaries(uintptr_t *start, size_t *len) +{ + uintptr_t page_size = getpagesize(); + uintptr_t page_mask = ~(page_size-1); + uintptr_t end = *start + *len; + uintptr_t old_start = *start; + msg_gspew("page_size=%" PRIxPTR "\n", page_size); + msg_gspew("pre-rounding: start=0x%0*" PRIxPTR ", len=0x%zx, end=0x%0*" PRIxPTR "\n", + PRIxPTR_WIDTH, *start, *len, PRIxPTR_WIDTH, end); + *start = *start & page_mask; + end = (end + page_size - 1) & page_mask; + *len = end - *start; + msg_gspew("post-rounding: start=0x%0*" PRIxPTR ", len=0x%zx, end=0x%0*" PRIxPTR "\n", + PRIxPTR_WIDTH, *start, *len, PRIxPTR_WIDTH, *start + *len); + return old_start - *start; +} + +struct undo_physmap_data { + void *virt_addr; + size_t len; +}; + +static int undo_physmap(void *data) +{ + if (data == NULL) { + msg_perr("%s: tried to physunmap without valid data!\n", __func__); + return 1; + } + struct undo_physmap_data *d = data; + physunmap_unaligned(d->virt_addr, d->len); + free(data); + return 0; +} + +static void *physmap_common(const char *descr, uintptr_t phys_addr, size_t len, bool readonly, bool autocleanup, + bool round) +{ + void *virt_addr; + uintptr_t offset = 0; + + if (len == 0) { + msg_pspew("Not mapping %s, zero size at 0x%0*" PRIxPTR ".\n", descr, PRIxPTR_WIDTH, phys_addr); + return ERROR_PTR; + } + + if (round) + offset = round_to_page_boundaries(&phys_addr, &len); + + if (readonly) + virt_addr = sys_physmap_ro_cached(phys_addr, len); + else + virt_addr = sys_physmap_rw_uncached(phys_addr, len); + + if (ERROR_PTR == virt_addr) { + if (NULL == descr) + descr = "memory"; + msg_perr("Error accessing %s, 0x%zx bytes at 0x%0*" PRIxPTR "\n", + descr, len, PRIxPTR_WIDTH, phys_addr); + msg_perr(MEM_DEV " mmap failed: %s\n", strerror(errno)); +#ifdef __linux__ + if (EINVAL == errno) { + msg_perr("In Linux this error can be caused by the CONFIG_NONPROMISC_DEVMEM (<2.6.27),\n"); + msg_perr("CONFIG_STRICT_DEVMEM (>=2.6.27) and CONFIG_X86_PAT kernel options.\n"); + msg_perr("Please check if either is enabled in your kernel before reporting a failure.\n"); + msg_perr("You can override CONFIG_X86_PAT at boot with the nopat kernel parameter but\n"); + msg_perr("disabling the other option unfortunately requires a kernel recompile. Sorry!\n"); + } +#elif defined (__OpenBSD__) + msg_perr("Please set securelevel=-1 in /etc/rc.securelevel " + "and reboot, or reboot into\n" + "single user mode.\n"); +#endif + return ERROR_PTR; + } + + if (autocleanup) { + struct undo_physmap_data *d = malloc(sizeof(*d)); + if (d == NULL) { + msg_perr("%s: Out of memory!\n", __func__); + physunmap_unaligned(virt_addr, len); + return ERROR_PTR; + } + + d->virt_addr = virt_addr; + d->len = len; + if (register_shutdown(undo_physmap, d) != 0) { + msg_perr("%s: Could not register shutdown function!\n", __func__); + physunmap_unaligned(virt_addr, len); + return ERROR_PTR; + } + } + + return virt_addr + offset; +} + +void physunmap_unaligned(void *virt_addr, size_t len) +{ + /* No need to check for zero size, such mappings would have yielded ERROR_PTR. */ + if (virt_addr == ERROR_PTR) { + msg_perr("Trying to unmap a nonexisting mapping!\n" + "Please report a bug at flashrom@flashrom.org\n"); + return; + } + + sys_physunmap_unaligned(virt_addr, len); +} + +void physunmap(void *virt_addr, size_t len) +{ + uintptr_t tmp; + + /* No need to check for zero size, such mappings would have yielded ERROR_PTR. */ + if (virt_addr == ERROR_PTR) { + msg_perr("Trying to unmap a nonexisting mapping!\n" + "Please report a bug at flashrom@flashrom.org\n"); + return; + } + tmp = (uintptr_t)virt_addr; + /* We assume that the virtual address of a page-aligned physical address is page-aligned as well. By + * extension, rounding a virtual unaligned address as returned by physmap should yield the same offset + * between rounded and original virtual address as between rounded and original physical address. + */ + round_to_page_boundaries(&tmp, &len); + virt_addr = (void *)tmp; + physunmap_unaligned(virt_addr, len); +} + +void *physmap(const char *descr, uintptr_t phys_addr, size_t len) +{ + return physmap_common(descr, phys_addr, len, PHYSM_RW, PHYSM_NOCLEANUP, PHYSM_ROUND); +} + +void *rphysmap(const char *descr, uintptr_t phys_addr, size_t len) +{ + return physmap_common(descr, phys_addr, len, PHYSM_RW, PHYSM_CLEANUP, PHYSM_ROUND); +} + +void *physmap_ro(const char *descr, uintptr_t phys_addr, size_t len) +{ + return physmap_common(descr, phys_addr, len, PHYSM_RO, PHYSM_NOCLEANUP, PHYSM_ROUND); +} + +void *physmap_ro_unaligned(const char *descr, uintptr_t phys_addr, size_t len) +{ + return physmap_common(descr, phys_addr, len, PHYSM_RO, PHYSM_NOCLEANUP, PHYSM_EXACT); +} diff --git a/hwaccess_physmap.h b/hwaccess_physmap.h new file mode 100644 index 000000000..eb3ddb8f5 --- /dev/null +++ b/hwaccess_physmap.h @@ -0,0 +1,27 @@ +/* + * This file is part of the flashrom project. + * + * This program 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; version 2 of the License. + * + * This program 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. + */ + +#ifndef __HWACCESS_PHYSMAP_H__ +#define __HWACCESS_PHYSMAP_H__ + +#include +#include + +void *physmap(const char *descr, uintptr_t phys_addr, size_t len); +void *rphysmap(const char *descr, uintptr_t phys_addr, size_t len); +void *physmap_ro(const char *descr, uintptr_t phys_addr, size_t len); +void *physmap_ro_unaligned(const char *descr, uintptr_t phys_addr, size_t len); +void physunmap(void *virt_addr, size_t len); +void physunmap_unaligned(void *virt_addr, size_t len); + +#endif /* __HWACCESS_PHYSMAP_H__ */ \ No newline at end of file diff --git a/ichspi.c b/ichspi.c index 290deaabb..0bb636024 100644 --- a/ichspi.c +++ b/ichspi.c @@ -24,6 +24,7 @@ #include "flash.h" #include "programmer.h" #include "hwaccess.h" +#include "hwaccess_physmap.h" #include "spi.h" #include "ich_descriptors.h" diff --git a/internal.c b/internal.c index 7de1d6a8b..f2f1fb167 100644 --- a/internal.c +++ b/internal.c @@ -21,6 +21,7 @@ #include "programmer.h" #include "hwaccess.h" #include "hwaccess_x86_io.h" +#include "hwaccess_physmap.h" #include "platform/pci.h" int is_laptop = 0; diff --git a/it8212.c b/it8212.c index 80da2b15a..6488b1543 100644 --- a/it8212.c +++ b/it8212.c @@ -19,6 +19,7 @@ #include "programmer.h" #include "hwaccess.h" #include "hwaccess_x86_io.h" +#include "hwaccess_physmap.h" #include "platform/pci.h" static uint8_t *it8212_bar = NULL; diff --git a/it85spi.c b/it85spi.c index 574e03af8..51328a898 100644 --- a/it85spi.c +++ b/it85spi.c @@ -27,6 +27,7 @@ #include "spi.h" #include "programmer.h" #include "hwaccess_x86_io.h" +#include "hwaccess_physmap.h" #define MAX_TIMEOUT 100000 #define MAX_TRY 5 diff --git a/mcp6x_spi.c b/mcp6x_spi.c index 242934658..2097cf4f8 100644 --- a/mcp6x_spi.c +++ b/mcp6x_spi.c @@ -24,6 +24,7 @@ #include "flash.h" #include "programmer.h" #include "hwaccess.h" +#include "hwaccess_physmap.h" #include "platform/pci.h" /* Bit positions for each pin. */ diff --git a/meson.build b/meson.build index 2e7296b0d..b2e2d72ba 100644 --- a/meson.build +++ b/meson.build @@ -349,7 +349,7 @@ if need_raw_access srcs += 'hwaccess.c' srcs += 'hwaccess_x86_io.c' srcs += 'hwaccess_x86_msr.c' - srcs += 'physmap.c' + srcs += 'hwaccess_physmap.c' cargs += '-DNEED_RAW_ACCESS=1' cargs += '-D__FLASHROM_HAVE_OUTB__=1' endif diff --git a/nicintel.c b/nicintel.c index 7f4eb24f1..21dfad2fb 100644 --- a/nicintel.c +++ b/nicintel.c @@ -20,6 +20,7 @@ #include "programmer.h" #include "hwaccess.h" #include "hwaccess_x86_io.h" +#include "hwaccess_physmap.h" #include "platform/pci.h" static uint8_t *nicintel_bar; diff --git a/nicintel_eeprom.c b/nicintel_eeprom.c index fc2ef4084..7b92958bd 100644 --- a/nicintel_eeprom.c +++ b/nicintel_eeprom.c @@ -36,6 +36,7 @@ #include "programmer.h" #include "hwaccess.h" #include "hwaccess_x86_io.h" +#include "hwaccess_physmap.h" #include "platform/pci.h" #define PCI_VENDOR_ID_INTEL 0x8086 diff --git a/nicintel_spi.c b/nicintel_spi.c index 25a665165..852c042ea 100644 --- a/nicintel_spi.c +++ b/nicintel_spi.c @@ -36,6 +36,7 @@ #include "programmer.h" #include "hwaccess.h" #include "hwaccess_x86_io.h" +#include "hwaccess_physmap.h" #include "platform/pci.h" #define PCI_VENDOR_ID_INTEL 0x8086 diff --git a/ogp_spi.c b/ogp_spi.c index 4a4934ec0..d4218d143 100644 --- a/ogp_spi.c +++ b/ogp_spi.c @@ -20,6 +20,7 @@ #include "programmer.h" #include "hwaccess.h" #include "hwaccess_x86_io.h" +#include "hwaccess_physmap.h" #include "platform/pci.h" #define PCI_VENDOR_ID_OGP 0x1227 diff --git a/physmap.c b/physmap.c deleted file mode 100644 index 6f2896ff7..000000000 --- a/physmap.c +++ /dev/null @@ -1,364 +0,0 @@ -/* - * This file is part of the flashrom project. - * - * Copyright (C) 2009 Peter Stuge - * Copyright (C) 2009 coresystems GmbH - * Copyright (C) 2010 Carl-Daniel Hailfinger - * Copyright (C) 2010 Rudolf Marek - * - * This program 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; version 2 of the License. - * - * This program 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. - */ - -#include -#include -#include -#include -#include -#include -#include "flash.h" -#include "programmer.h" -#include "hwaccess.h" - -#if !defined(__DJGPP__) && !defined(__LIBPAYLOAD__) -/* No file access needed/possible to get mmap access permissions or access MSR. */ -#include -#include -#endif - -#ifdef __DJGPP__ -#include -#include -#include - -#define ONE_MEGABYTE (1024 * 1024) -#define MEM_DEV "dpmi" - -static void *realmem_map_aligned; - -static void *map_first_meg(uintptr_t phys_addr, size_t len) -{ - void *realmem_map; - size_t pagesize; - - if (realmem_map_aligned) - return realmem_map_aligned + phys_addr; - - /* valloc() from DJGPP 2.05 does not work properly */ - pagesize = getpagesize(); - - realmem_map = malloc(ONE_MEGABYTE + pagesize); - - if (!realmem_map) - return ERROR_PTR; - - realmem_map_aligned = (void *)(((size_t) realmem_map + - (pagesize - 1)) & ~(pagesize - 1)); - - if (__djgpp_map_physical_memory(realmem_map_aligned, ONE_MEGABYTE, 0)) { - free(realmem_map); - realmem_map_aligned = NULL; - return ERROR_PTR; - } - - return realmem_map_aligned + phys_addr; -} - -static void *sys_physmap(uintptr_t phys_addr, size_t len) -{ - int ret; - __dpmi_meminfo mi; - - /* Enable 4GB limit on DS descriptor. */ - if (!__djgpp_nearptr_enable()) - return ERROR_PTR; - - if ((phys_addr + len - 1) < ONE_MEGABYTE) { - /* We need to use another method to map first 1MB. */ - return map_first_meg(phys_addr, len); - } - - mi.address = phys_addr; - mi.size = len; - ret = __dpmi_physical_address_mapping(&mi); - - if (ret != 0) - return ERROR_PTR; - - return (void *) mi.address + __djgpp_conventional_base; -} - -#define sys_physmap_rw_uncached sys_physmap -#define sys_physmap_ro_cached sys_physmap - -static void sys_physunmap_unaligned(void *virt_addr, size_t len) -{ - __dpmi_meminfo mi; - - /* There is no known way to unmap the first 1 MB. The DPMI server will - * do this for us on exit. - */ - if ((virt_addr >= realmem_map_aligned) && - ((virt_addr + len) <= (realmem_map_aligned + ONE_MEGABYTE))) { - return; - } - - mi.address = (unsigned long) virt_addr; - __dpmi_free_physical_address_mapping(&mi); -} - -#elif defined(__LIBPAYLOAD__) -#include - -#define MEM_DEV "" - -void *sys_physmap(uintptr_t phys_addr, size_t len) -{ - return (void *)phys_to_virt(phys_addr); -} - -#define sys_physmap_rw_uncached sys_physmap -#define sys_physmap_ro_cached sys_physmap - -static void sys_physunmap_unaligned(void *virt_addr, size_t len) -{ -} -#elif defined(__MACH__) && defined(__APPLE__) - -#define MEM_DEV "DirectHW" - -static void *sys_physmap(uintptr_t phys_addr, size_t len) -{ - /* The short form of ?: is a GNU extension. - * FIXME: map_physical returns NULL both for errors and for success - * if the region is mapped at virtual address zero. If in doubt, report - * an error until a better interface exists. - */ - return map_physical(phys_addr, len) ? : ERROR_PTR; -} - -/* The OS X driver does not differentiate between mapping types. */ -#define sys_physmap_rw_uncached sys_physmap -#define sys_physmap_ro_cached sys_physmap - -static void sys_physunmap_unaligned(void *virt_addr, size_t len) -{ - unmap_physical(virt_addr, len); -} - -#else -#include - -#if defined (__sun) && (defined(__i386) || defined(__amd64)) -# define MEM_DEV "/dev/xsvc" -#else -# define MEM_DEV "/dev/mem" -#endif - -static int fd_mem = -1; -static int fd_mem_cached = -1; - -/* For MMIO access. Must be uncached, doesn't make sense to restrict to ro. */ -static void *sys_physmap_rw_uncached(uintptr_t phys_addr, size_t len) -{ - void *virt_addr; - - if (-1 == fd_mem) { - /* Open the memory device UNCACHED. Important for MMIO. */ - if (-1 == (fd_mem = open(MEM_DEV, O_RDWR | O_SYNC))) { - msg_perr("Critical error: open(" MEM_DEV "): %s\n", strerror(errno)); - return ERROR_PTR; - } - } - - virt_addr = mmap(NULL, len, PROT_WRITE | PROT_READ, MAP_SHARED, fd_mem, (off_t)phys_addr); - return MAP_FAILED == virt_addr ? ERROR_PTR : virt_addr; -} - -/* For reading DMI/coreboot/whatever tables. We should never write, and we - * do not care about caching. - */ -static void *sys_physmap_ro_cached(uintptr_t phys_addr, size_t len) -{ - void *virt_addr; - - if (-1 == fd_mem_cached) { - /* Open the memory device CACHED. */ - if (-1 == (fd_mem_cached = open(MEM_DEV, O_RDWR))) { - msg_perr("Critical error: open(" MEM_DEV "): %s\n", strerror(errno)); - return ERROR_PTR; - } - } - - virt_addr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd_mem_cached, (off_t)phys_addr); - return MAP_FAILED == virt_addr ? ERROR_PTR : virt_addr; -} - -static void sys_physunmap_unaligned(void *virt_addr, size_t len) -{ - munmap(virt_addr, len); -} -#endif - -#define PHYSM_RW 0 -#define PHYSM_RO 1 -#define PHYSM_NOCLEANUP 0 -#define PHYSM_CLEANUP 1 -#define PHYSM_EXACT 0 -#define PHYSM_ROUND 1 - -/* Round start to nearest page boundary below and set len so that the resulting address range ends at the lowest - * possible page boundary where the original address range is still entirely contained. It returns the - * difference between the rounded start address and the original start address. */ -static uintptr_t round_to_page_boundaries(uintptr_t *start, size_t *len) -{ - uintptr_t page_size = getpagesize(); - uintptr_t page_mask = ~(page_size-1); - uintptr_t end = *start + *len; - uintptr_t old_start = *start; - msg_gspew("page_size=%" PRIxPTR "\n", page_size); - msg_gspew("pre-rounding: start=0x%0*" PRIxPTR ", len=0x%zx, end=0x%0*" PRIxPTR "\n", - PRIxPTR_WIDTH, *start, *len, PRIxPTR_WIDTH, end); - *start = *start & page_mask; - end = (end + page_size - 1) & page_mask; - *len = end - *start; - msg_gspew("post-rounding: start=0x%0*" PRIxPTR ", len=0x%zx, end=0x%0*" PRIxPTR "\n", - PRIxPTR_WIDTH, *start, *len, PRIxPTR_WIDTH, *start + *len); - return old_start - *start; -} - -struct undo_physmap_data { - void *virt_addr; - size_t len; -}; - -static int undo_physmap(void *data) -{ - if (data == NULL) { - msg_perr("%s: tried to physunmap without valid data!\n", __func__); - return 1; - } - struct undo_physmap_data *d = data; - physunmap_unaligned(d->virt_addr, d->len); - free(data); - return 0; -} - -static void *physmap_common(const char *descr, uintptr_t phys_addr, size_t len, bool readonly, bool autocleanup, - bool round) -{ - void *virt_addr; - uintptr_t offset = 0; - - if (len == 0) { - msg_pspew("Not mapping %s, zero size at 0x%0*" PRIxPTR ".\n", descr, PRIxPTR_WIDTH, phys_addr); - return ERROR_PTR; - } - - if (round) - offset = round_to_page_boundaries(&phys_addr, &len); - - if (readonly) - virt_addr = sys_physmap_ro_cached(phys_addr, len); - else - virt_addr = sys_physmap_rw_uncached(phys_addr, len); - - if (ERROR_PTR == virt_addr) { - if (NULL == descr) - descr = "memory"; - msg_perr("Error accessing %s, 0x%zx bytes at 0x%0*" PRIxPTR "\n", - descr, len, PRIxPTR_WIDTH, phys_addr); - msg_perr(MEM_DEV " mmap failed: %s\n", strerror(errno)); -#ifdef __linux__ - if (EINVAL == errno) { - msg_perr("In Linux this error can be caused by the CONFIG_NONPROMISC_DEVMEM (<2.6.27),\n"); - msg_perr("CONFIG_STRICT_DEVMEM (>=2.6.27) and CONFIG_X86_PAT kernel options.\n"); - msg_perr("Please check if either is enabled in your kernel before reporting a failure.\n"); - msg_perr("You can override CONFIG_X86_PAT at boot with the nopat kernel parameter but\n"); - msg_perr("disabling the other option unfortunately requires a kernel recompile. Sorry!\n"); - } -#elif defined (__OpenBSD__) - msg_perr("Please set securelevel=-1 in /etc/rc.securelevel " - "and reboot, or reboot into\n" - "single user mode.\n"); -#endif - return ERROR_PTR; - } - - if (autocleanup) { - struct undo_physmap_data *d = malloc(sizeof(*d)); - if (d == NULL) { - msg_perr("%s: Out of memory!\n", __func__); - physunmap_unaligned(virt_addr, len); - return ERROR_PTR; - } - - d->virt_addr = virt_addr; - d->len = len; - if (register_shutdown(undo_physmap, d) != 0) { - msg_perr("%s: Could not register shutdown function!\n", __func__); - physunmap_unaligned(virt_addr, len); - return ERROR_PTR; - } - } - - return virt_addr + offset; -} - -void physunmap_unaligned(void *virt_addr, size_t len) -{ - /* No need to check for zero size, such mappings would have yielded ERROR_PTR. */ - if (virt_addr == ERROR_PTR) { - msg_perr("Trying to unmap a nonexisting mapping!\n" - "Please report a bug at flashrom@flashrom.org\n"); - return; - } - - sys_physunmap_unaligned(virt_addr, len); -} - -void physunmap(void *virt_addr, size_t len) -{ - uintptr_t tmp; - - /* No need to check for zero size, such mappings would have yielded ERROR_PTR. */ - if (virt_addr == ERROR_PTR) { - msg_perr("Trying to unmap a nonexisting mapping!\n" - "Please report a bug at flashrom@flashrom.org\n"); - return; - } - tmp = (uintptr_t)virt_addr; - /* We assume that the virtual address of a page-aligned physical address is page-aligned as well. By - * extension, rounding a virtual unaligned address as returned by physmap should yield the same offset - * between rounded and original virtual address as between rounded and original physical address. - */ - round_to_page_boundaries(&tmp, &len); - virt_addr = (void *)tmp; - physunmap_unaligned(virt_addr, len); -} - -void *physmap(const char *descr, uintptr_t phys_addr, size_t len) -{ - return physmap_common(descr, phys_addr, len, PHYSM_RW, PHYSM_NOCLEANUP, PHYSM_ROUND); -} - -void *rphysmap(const char *descr, uintptr_t phys_addr, size_t len) -{ - return physmap_common(descr, phys_addr, len, PHYSM_RW, PHYSM_CLEANUP, PHYSM_ROUND); -} - -void *physmap_ro(const char *descr, uintptr_t phys_addr, size_t len) -{ - return physmap_common(descr, phys_addr, len, PHYSM_RO, PHYSM_NOCLEANUP, PHYSM_ROUND); -} - -void *physmap_ro_unaligned(const char *descr, uintptr_t phys_addr, size_t len) -{ - return physmap_common(descr, phys_addr, len, PHYSM_RO, PHYSM_NOCLEANUP, PHYSM_EXACT); -} diff --git a/programmer.h b/programmer.h index c4af35ae0..4dd4cad80 100644 --- a/programmer.h +++ b/programmer.h @@ -231,14 +231,6 @@ int chipset_flash_enable(void); int processor_flash_enable(void); #endif -/* physmap.c */ -void *physmap(const char *descr, uintptr_t phys_addr, size_t len); -void *rphysmap(const char *descr, uintptr_t phys_addr, size_t len); -void *physmap_ro(const char *descr, uintptr_t phys_addr, size_t len); -void *physmap_ro_unaligned(const char *descr, uintptr_t phys_addr, size_t len); -void physunmap(void *virt_addr, size_t len); -void physunmap_unaligned(void *virt_addr, size_t len); - #if CONFIG_INTERNAL == 1 /* cbtable.c */ int cb_parse_table(const char **vendor, const char **model); diff --git a/satamv.c b/satamv.c index 8543f5309..e7c4305de 100644 --- a/satamv.c +++ b/satamv.c @@ -21,6 +21,7 @@ #include "programmer.h" #include "hwaccess.h" #include "hwaccess_x86_io.h" +#include "hwaccess_physmap.h" #include "platform/pci.h" static uint8_t *mv_bar; diff --git a/satasii.c b/satasii.c index 2f220d154..f9cb5daa8 100644 --- a/satasii.c +++ b/satasii.c @@ -19,6 +19,7 @@ #include "programmer.h" #include "hwaccess.h" #include "hwaccess_x86_io.h" +#include "hwaccess_physmap.h" #include "platform/pci.h" #define PCI_VENDOR_ID_SII 0x1095 diff --git a/sb600spi.c b/sb600spi.c index 92fcc8109..32a74203e 100644 --- a/sb600spi.c +++ b/sb600spi.c @@ -23,6 +23,7 @@ #include "flash.h" #include "programmer.h" #include "hwaccess.h" +#include "hwaccess_physmap.h" #include "spi.h" #include "platform/pci.h" -- cgit v1.2.3