14adb7eaa9
Same as with other consoles and drivers that cache an address outside the payload (e.g. video/corebootfb), we should store the physical address, so we can derive the virtual address on demand. This makes it save to use the address across relocations. As a first step in migrating `libsysinfo` to `uintptr_t`, we also switch to the physical address there. Fixes the default build of FILO, tested with Qemu/i440FX and Qemu/Q35. Change-Id: I4b8434af69e0526f78523ae61981a15abb1295b0 Signed-off-by: Nico Huber <nico.h@gmx.de> Reviewed-on: https://review.coreboot.org/c/coreboot/+/37478 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
128 lines
3.9 KiB
C
128 lines
3.9 KiB
C
/*
|
|
*
|
|
* Copyright (c) 2012 Google Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <libpayload.h>
|
|
#include <stdint.h>
|
|
|
|
struct cbmem_console {
|
|
uint32_t size;
|
|
uint32_t cursor;
|
|
uint8_t body[0];
|
|
} __packed;
|
|
|
|
#define CURSOR_MASK ((1 << 28) - 1)
|
|
#define OVERFLOW (1 << 31)
|
|
|
|
static uintptr_t cbmem_console_p;
|
|
|
|
static struct console_output_driver cbmem_console_driver =
|
|
{
|
|
.write = &cbmem_console_write,
|
|
};
|
|
|
|
static void do_write(const void *buffer, size_t count)
|
|
{
|
|
struct cbmem_console *const cbmem_cons = phys_to_virt(cbmem_console_p);
|
|
|
|
memcpy(cbmem_cons->body + (cbmem_cons->cursor & CURSOR_MASK), buffer, count);
|
|
cbmem_cons->cursor += count;
|
|
}
|
|
|
|
void cbmem_console_init(void)
|
|
{
|
|
const struct cbmem_console *const cbmem_cons = phys_to_virt(lib_sysinfo.cbmem_cons);
|
|
|
|
cbmem_console_p = lib_sysinfo.cbmem_cons;
|
|
|
|
if (cbmem_console_p && cbmem_cons->size)
|
|
console_add_output_driver(&cbmem_console_driver);
|
|
}
|
|
|
|
void cbmem_console_write(const void *buffer, size_t count)
|
|
{
|
|
struct cbmem_console *const cbmem_cons = phys_to_virt(cbmem_console_p);
|
|
|
|
while ((cbmem_cons->cursor & CURSOR_MASK) + count >=
|
|
cbmem_cons->size) {
|
|
size_t still_fits = cbmem_cons->size - (cbmem_cons->cursor & CURSOR_MASK);
|
|
do_write(buffer, still_fits);
|
|
cbmem_cons->cursor &= ~CURSOR_MASK;
|
|
cbmem_cons->cursor |= OVERFLOW;
|
|
buffer += still_fits;
|
|
count -= still_fits;
|
|
}
|
|
|
|
do_write(buffer, count);
|
|
}
|
|
|
|
char *cbmem_console_snapshot(void)
|
|
{
|
|
const struct cbmem_console *const console_p = phys_to_virt(cbmem_console_p);
|
|
char *console_c;
|
|
uint32_t size, cursor, overflow;
|
|
|
|
if (!console_p) {
|
|
printf("ERROR: No cbmem console found in coreboot table\n");
|
|
return NULL;
|
|
}
|
|
|
|
cursor = console_p->cursor & CURSOR_MASK;
|
|
overflow = console_p->cursor & OVERFLOW;
|
|
if (!overflow && cursor < console_p->size)
|
|
size = cursor;
|
|
else
|
|
size = console_p->size;
|
|
|
|
console_c = malloc(size + 1);
|
|
if (!console_c) {
|
|
printf("ERROR: Not enough memory for console (size = %u)\n",
|
|
size);
|
|
return NULL;
|
|
}
|
|
console_c[size] = '\0';
|
|
|
|
if (overflow) {
|
|
if (cursor >= size) {
|
|
printf("ERROR: CBMEM console struct is corrupted\n");
|
|
return NULL;
|
|
}
|
|
memcpy(console_c, console_p->body + cursor, size - cursor);
|
|
memcpy(console_c + size - cursor, console_p->body, cursor);
|
|
} else {
|
|
memcpy(console_c, console_p->body, size);
|
|
}
|
|
|
|
/* Slight memory corruption may occur between reboots and give us a few
|
|
unprintable characters like '\0'. Replace them with '?' on output. */
|
|
for (cursor = 0; cursor < size; cursor++)
|
|
if (!isprint(console_c[cursor]) && !isspace(console_c[cursor]))
|
|
console_c[cursor] = '?';
|
|
|
|
return console_c;
|
|
}
|