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coreboot-kgpe-d16/payloads/libpayload/arch/x86/boot_media.c

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libpayload: Add boot_device_read() function This patch adds a new way of implementing flash access for libpayload. Until now all reads had to be performed using cbfs_media, which is obsolete. From now on all reads should be performed using boot_device_read(). This patch also provides a default implementation of boot_device_read() for x86 architecture. Change-Id: I1babd2a8414ed9de3ca49903fcb4f036997b5ff3 Signed-off-by: Jakub Czapiga <jacz@semihalf.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/59492 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>
2021-11-12 12:31:21 +01:00
/* SPDX-License-Identifier: BSD-3-Clause */
libpayload/x86: Fix boot_device_read() and hook it up Casts from integer to pointer are usually a case for phys_to_virt(). Change-Id: I861d435ff2361cdc26a2abd46d43b9346fa67ccc Signed-off-by: Nico Huber <nico.h@gmx.de> Reviewed-on: https://review.coreboot.org/c/coreboot/+/62246 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>
2022-02-22 02:06:51 +01:00
#include <arch/virtual.h>
libpayload: Add boot_device_read() function This patch adds a new way of implementing flash access for libpayload. Until now all reads had to be performed using cbfs_media, which is obsolete. From now on all reads should be performed using boot_device_read(). This patch also provides a default implementation of boot_device_read() for x86 architecture. Change-Id: I1babd2a8414ed9de3ca49903fcb4f036997b5ff3 Signed-off-by: Jakub Czapiga <jacz@semihalf.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/59492 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>
2021-11-12 12:31:21 +01:00
#include <boot_device.h>
#include <commonlib/bsd/cb_err.h>
#include <stddef.h>
#include <string.h>
#include <sysinfo.h>
__attribute__((weak)) ssize_t boot_device_read(void *buf, size_t offset, size_t size)
{
/* Memory-mapping usually only works for the top 16MB. */
if (!lib_sysinfo.boot_media_size || lib_sysinfo.boot_media_size - offset > 16 * MiB)
return CB_ERR_ARG;
libpayload/x86: Fix boot_device_read() and hook it up Casts from integer to pointer are usually a case for phys_to_virt(). Change-Id: I861d435ff2361cdc26a2abd46d43b9346fa67ccc Signed-off-by: Nico Huber <nico.h@gmx.de> Reviewed-on: https://review.coreboot.org/c/coreboot/+/62246 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>
2022-02-22 02:06:51 +01:00
const void *const ptr = phys_to_virt(0 - lib_sysinfo.boot_media_size + offset);
libpayload: Add boot_device_read() function This patch adds a new way of implementing flash access for libpayload. Until now all reads had to be performed using cbfs_media, which is obsolete. From now on all reads should be performed using boot_device_read(). This patch also provides a default implementation of boot_device_read() for x86 architecture. Change-Id: I1babd2a8414ed9de3ca49903fcb4f036997b5ff3 Signed-off-by: Jakub Czapiga <jacz@semihalf.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/59492 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>
2021-11-12 12:31:21 +01:00
memcpy(buf, ptr, size);
return size;
}