Ejemplos de sys_physmap_ro_cached en C++ (Cpp)

Ejemplo n.º 1

Archivo: physmap.c Proyecto: chmousset/flashrom

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(struct undo_physmap_data));
		if (d == NULL) {
			msg_perr("%s: Out of memory!\n", __func__);
			physunmap(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(virt_addr, len);
			return ERROR_PTR;
		}
	}

	return virt_addr + offset;
}

Ejemplo n.º 2

Archivo: physmap.c Proyecto: 0xCrashOverride/flashrom

static void *physmap_common(const char *descr, unsigned long phys_addr, size_t len, int mayfail, int readonly)
{
	void *virt_addr;

	if (len == 0) {
		msg_pspew("Not mapping %s, zero size at 0x%08lx.\n",
			     descr, phys_addr);
		return ERROR_PTR;
	}
		
	if ((getpagesize() - 1) & len) {
		msg_perr("Mapping %s at 0x%08lx, unaligned size 0x%lx.\n",
			descr, phys_addr, (unsigned long)len);
	}

	if ((getpagesize() - 1) & phys_addr) {
		msg_perr("Mapping %s, 0x%lx bytes at unaligned 0x%08lx.\n",
			descr, (unsigned long)len, phys_addr);
	}

	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%lx bytes at 0x%08lx\n", descr, (unsigned long)len, phys_addr);
		perror(MEM_DEV " mmap failed");
#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");
		msg_perr("single user mode.\n");
#endif
		if (!mayfail)
			exit(3);
	}

	return virt_addr;
}