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Diffstat (limited to 'src/drivers/spi/flashconsole.c')
-rw-r--r--src/drivers/spi/flashconsole.c74
1 files changed, 31 insertions, 43 deletions
diff --git a/src/drivers/spi/flashconsole.c b/src/drivers/spi/flashconsole.c
index 8874812449..c56bf52d92 100644
--- a/src/drivers/spi/flashconsole.c
+++ b/src/drivers/spi/flashconsole.c
@@ -11,7 +11,6 @@
* GNU General Public License for more details.
*/
-#include <arch/early_variables.h>
#include <commonlib/region.h>
#include <boot_device.h>
#include <fmap.h>
@@ -23,26 +22,25 @@
#define LINE_BUFFER_SIZE 128
#define READ_BUFFER_SIZE 0x100
-static const struct region_device *g_rdev_ptr CAR_GLOBAL;
-static struct region_device g_rdev CAR_GLOBAL;
-static uint8_t g_line_buffer[LINE_BUFFER_SIZE] CAR_GLOBAL;
-static size_t g_offset CAR_GLOBAL;
-static size_t g_line_offset CAR_GLOBAL;
+static const struct region_device *g_rdev_ptr;
+static struct region_device g_rdev;
+static uint8_t g_line_buffer[LINE_BUFFER_SIZE];
+static size_t g_offset;
+static size_t g_line_offset;
void flashconsole_init(void)
{
- struct region_device *rdev = car_get_var_ptr(&g_rdev);
uint8_t buffer[READ_BUFFER_SIZE];
size_t size;
size_t offset = 0;
size_t len = READ_BUFFER_SIZE;
size_t i;
- if (fmap_locate_area_as_rdev_rw("CONSOLE", rdev)) {
+ if (fmap_locate_area_as_rdev_rw("CONSOLE", &g_rdev)) {
printk(BIOS_INFO, "Can't find 'CONSOLE' area in FMAP\n");
return;
}
- size = region_device_sz(rdev);
+ size = region_device_sz(&g_rdev);
/*
* We need to check the region until we find a 0xff indicating
@@ -58,7 +56,7 @@ void flashconsole_init(void)
// Fill the buffer on first iteration
if (i == 0) {
len = min(READ_BUFFER_SIZE, size - offset);
- if (rdev_readat(rdev, buffer, offset, len) != len)
+ if (rdev_readat(&g_rdev, buffer, offset, len) != len)
return;
}
if (buffer[i] == 0xff) {
@@ -77,65 +75,55 @@ void flashconsole_init(void)
return;
}
- car_set_var(g_offset, offset);
- /* Set g_rdev_ptr last so tx_byte doesn't get executed early */
- car_set_var(g_rdev_ptr, rdev);
+ g_offset = offset;
+ g_rdev_ptr = &g_rdev;
}
void flashconsole_tx_byte(unsigned char c)
{
- const struct region_device *rdev = car_get_var(g_rdev_ptr);
- uint8_t *line_buffer;
- size_t offset;
- size_t len;
- size_t region_size;
-
- if (!rdev)
+ if (!g_rdev_ptr)
return;
- line_buffer = car_get_var_ptr(g_line_buffer);
- offset = car_get_var(g_offset);
- len = car_get_var(g_line_offset);
- region_size = region_device_sz(rdev);
+ size_t region_size = region_device_sz(g_rdev_ptr);
- line_buffer[len++] = c;
- car_set_var(g_line_offset, len);
+ g_line_buffer[g_line_offset++] = c;
- if (len >= LINE_BUFFER_SIZE ||
- offset + len >= region_size || c == '\n') {
+ if (g_line_offset >= LINE_BUFFER_SIZE ||
+ g_offset + g_line_offset >= region_size || c == '\n') {
flashconsole_tx_flush();
}
}
void flashconsole_tx_flush(void)
{
- const struct region_device *rdev = car_get_var(g_rdev_ptr);
- uint8_t *line_buffer = car_get_var_ptr(g_line_buffer);
- size_t offset = car_get_var(g_offset);
- size_t len = car_get_var(g_line_offset);
+ size_t offset = g_offset;
+ size_t len = g_line_offset;
size_t region_size;
-
- if (!rdev)
- return;
+ static int busy;
/* Prevent any recursive loops in case the spi flash driver
* calls printk (in case of transaction timeout or
* any other error while writing) */
- car_set_var(g_rdev_ptr, NULL);
+ if (busy)
+ return;
- region_size = region_device_sz(rdev);
+ if (!g_rdev_ptr)
+ return;
+
+ busy = 1;
+ region_size = region_device_sz(g_rdev_ptr);
if (offset + len >= region_size)
len = region_size - offset;
- if (rdev_writeat(rdev, line_buffer, offset, len) != len)
- rdev = NULL;
+ if (rdev_writeat(&g_rdev, g_line_buffer, offset, len) != len)
+ return;
// If the region is full, stop future write attempts
if (offset + len >= region_size)
- rdev = NULL;
+ return;
- car_set_var(g_offset, offset + len);
- car_set_var(g_line_offset, 0);
+ g_offset = offset + len;
+ g_line_offset = 0;
- car_set_var(g_rdev_ptr, rdev);
+ busy = 0;
}