[coreboot-gerrit] Patch set updated for coreboot: a6a1a07 CBMEM console: Fix and enhance pre-RAM support
Kyösti Mälkki (kyosti.malkki@gmail.com)
gerrit at coreboot.org
Sun Jan 11 07:35:39 CET 2015
Kyösti Mälkki (kyosti.malkki at gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/7862
-gerrit
commit a6a1a070b6146cba3e34eabb06085ed8f8441fe5
Author: Kyösti Mälkki <kyosti.malkki at gmail.com>
Date: Sun Dec 21 08:55:47 2014 +0200
CBMEM console: Fix and enhance pre-RAM support
Use the value of CONSOLE_PRERAM_BUFFER_SIZE to determine if we can
do CBMEM console in bootblock and romstage. Kconfig forces it to zero
if _BASE is unset or we cannot do CAR migration on x86.
Add CBMEM console to bootblock, except for x86. Only one of bootblock
and romstage clears the pre-RAM buffer.
To start with empty console log on S3 wakeup, ramstage now clears
previous contents of CBMEM buffer if there was no pre-RAM buffer.
Unify Kconfig variable naming.
TODO: ARM configurations do not define PRERAM_BUFFER_BASE values.
Change-Id: I70d82da629529dbfd7bc9491223abd703cbc0115
Signed-off-by: Kyösti Mälkki <kyosti.malkki at gmail.com>
---
src/arch/arm/Kconfig | 4 --
src/arch/arm/bootblock.ld | 2 +-
src/arch/arm/romstage.ld | 2 +-
src/arch/arm64/bootblock.ld | 2 +
src/arch/arm64/romstage.ld | 2 +-
src/arch/riscv/romstage.ld | 2 +-
src/console/Kconfig | 14 +++++--
src/include/console/cbmem_console.h | 3 +-
src/lib/Makefile.inc | 1 +
src/lib/cbmem_console.c | 80 +++++++++++++++++++++----------------
10 files changed, 65 insertions(+), 47 deletions(-)
diff --git a/src/arch/arm/Kconfig b/src/arch/arm/Kconfig
index 156c8c2..60c8c8d 100644
--- a/src/arch/arm/Kconfig
+++ b/src/arch/arm/Kconfig
@@ -20,10 +20,6 @@ config ARM_BOOTBLOCK_CUSTOM
bool
default n
-config CBMEM_CONSOLE_PRERAM_BASE
- hex
- depends on CONSOLE_CBMEM
-
config CPU_HAS_BOOTBLOCK_INIT
bool
default n
diff --git a/src/arch/arm/bootblock.ld b/src/arch/arm/bootblock.ld
index 150bf2d..c355348 100644
--- a/src/arch/arm/bootblock.ld
+++ b/src/arch/arm/bootblock.ld
@@ -49,7 +49,7 @@ SECTIONS
*(.sbss.*);
} : to_load = 0xff
- preram_cbmem_console = CONFIG_CBMEM_CONSOLE_PRERAM_BASE;
+ preram_cbmem_console = CONFIG_CONSOLE_PRERAM_BUFFER_BASE;
/DISCARD/ : {
*(.comment)
diff --git a/src/arch/arm/romstage.ld b/src/arch/arm/romstage.ld
index 8c32046..34e9eaa 100644
--- a/src/arch/arm/romstage.ld
+++ b/src/arch/arm/romstage.ld
@@ -69,7 +69,7 @@ SECTIONS
_end = .;
- preram_cbmem_console = CONFIG_CBMEM_CONSOLE_PRERAM_BASE;
+ preram_cbmem_console = CONFIG_CONSOLE_PRERAM_BUFFER_BASE;
/* Discard the sections we don't need/want */
/DISCARD/ : {
diff --git a/src/arch/arm64/bootblock.ld b/src/arch/arm64/bootblock.ld
index acce1f1..907d009 100644
--- a/src/arch/arm64/bootblock.ld
+++ b/src/arch/arm64/bootblock.ld
@@ -49,6 +49,8 @@ SECTIONS
*(.sbss.*);
} : to_load = 0xff
+ preram_cbmem_console = CONFIG_CONSOLE_PRERAM_BUFFER_BASE;
+
/DISCARD/ : {
*(.comment)
*(.note)
diff --git a/src/arch/arm64/romstage.ld b/src/arch/arm64/romstage.ld
index d05fdd1..a8d092c 100644
--- a/src/arch/arm64/romstage.ld
+++ b/src/arch/arm64/romstage.ld
@@ -76,7 +76,7 @@ SECTIONS
_end = .;
- preram_cbmem_console = CONFIG_CBMEM_CONSOLE_PRERAM_BASE;
+ preram_cbmem_console = CONFIG_CONSOLE_PRERAM_BUFFER_BASE;
/* Discard the sections we don't need/want */
/DISCARD/ : {
diff --git a/src/arch/riscv/romstage.ld b/src/arch/riscv/romstage.ld
index 839c285..a58aee3 100644
--- a/src/arch/riscv/romstage.ld
+++ b/src/arch/riscv/romstage.ld
@@ -76,7 +76,7 @@ SECTIONS
_end = .;
- /*preram_cbmem_console = CONFIG_CBMEM_CONSOLE_PRERAM_BASE;*/
+ /*preram_cbmem_console = CONFIG_CONSOLE_PRERAM_BUFFER_BASE;*/
/* Discard the sections we don't need/want */
/DISCARD/ : {
diff --git a/src/console/Kconfig b/src/console/Kconfig
index 0d32011..5974695 100644
--- a/src/console/Kconfig
+++ b/src/console/Kconfig
@@ -175,8 +175,9 @@ config CONSOLE_CBMEM
Enable this to save the console output in a CBMEM buffer. This would
allow to see coreboot console output from Linux space.
+if CONSOLE_CBMEM
+
config CONSOLE_CBMEM_BUFFER_SIZE
- depends on CONSOLE_CBMEM
hex "Room allocated for console output in CBMEM"
default 0x20000
help
@@ -184,9 +185,14 @@ config CONSOLE_CBMEM_BUFFER_SIZE
value (128K or 0x20000 bytes) is large enough to accommodate
even the BIOS_SPEW level.
+config CONSOLE_PRERAM_BUFFER_BASE
+ hex
+ default 0xabadbeef if !CACHE_AS_RAM || BROKEN_CAR_MIGRATE
+ default 0x0
+
config CONSOLE_PRERAM_BUFFER_SIZE
- depends on CONSOLE_CBMEM
- hex "Room allocated for console output before RAM is initialized"
+ hex
+ default 0x0 if CONSOLE_PRERAM_BUFFER_BASE = 0xabadbeef
default 0xc00
help
Console is used before RAM is initialized. This is the room reserved
@@ -194,6 +200,8 @@ config CONSOLE_PRERAM_BUFFER_SIZE
can be saved in a CBMEM buffer. 3K bytes should be enough even for
the BIOS_SPEW level.
+endif
+
config CONSOLE_QEMU_DEBUGCON
bool "QEMU debug console output"
depends on BOARD_EMULATION_QEMU_X86
diff --git a/src/include/console/cbmem_console.h b/src/include/console/cbmem_console.h
index 36d132c..81bc10f 100644
--- a/src/include/console/cbmem_console.h
+++ b/src/include/console/cbmem_console.h
@@ -32,7 +32,8 @@ static inline void cbmemc_reinit(void) {}
#endif
#define __CBMEM_CONSOLE_ENABLE__ CONFIG_CONSOLE_CBMEM && \
- ((ENV_ROMSTAGE && !CONFIG_BROKEN_CAR_MIGRATE) || ENV_RAMSTAGE)
+ (ENV_RAMSTAGE || (CONFIG_CONSOLE_PRERAM_BUFFER_SIZE && \
+ ((ENV_BOOTBLOCK && CONFIG_BOOTBLOCK_CONSOLE) || ENV_ROMSTAGE)))
#if __CBMEM_CONSOLE_ENABLE__
static inline void __cbmemc_init(void) { cbmemc_init(); }
diff --git a/src/lib/Makefile.inc b/src/lib/Makefile.inc
index 9b5f56b..7e23399 100644
--- a/src/lib/Makefile.inc
+++ b/src/lib/Makefile.inc
@@ -21,6 +21,7 @@ subdirs-y += loaders
bootblock-y += cbfs.c cbfs_core.c
bootblock-$(CONFIG_COMMON_CBFS_SPI_WRAPPER) += cbfs_spi.c
+bootblock-$(CONFIG_CONSOLE_CBMEM) += cbmem_console.c
bootblock-y += memchr.c
bootblock-y += memcmp.c
diff --git a/src/lib/cbmem_console.c b/src/lib/cbmem_console.c
index a8195a6..6783b30 100644
--- a/src/lib/cbmem_console.c
+++ b/src/lib/cbmem_console.c
@@ -37,6 +37,9 @@ struct cbmem_console {
static struct cbmem_console *cbmem_console_p CAR_GLOBAL;
+static void copy_console_buffer(struct cbmem_console *old_cons_p,
+ struct cbmem_console *new_cons_p);
+
#ifdef __PRE_RAM__
/*
* While running from ROM, before DRAM is initialized, some area in cache as
@@ -63,6 +66,10 @@ extern struct cbmem_console preram_cbmem_console;
static u8 static_console[STATIC_CONSOLE_SIZE];
#endif
+/* flags for init */
+#define CBMEMC_RESET (1<<0)
+#define CBMEMC_APPEND (1<<1)
+
static inline struct cbmem_console *current_console(void)
{
return car_sync_var(cbmem_console_p);
@@ -73,27 +80,46 @@ static inline void current_console_set(struct cbmem_console *new_console_p)
car_set_var(cbmem_console_p, new_console_p);
}
-static inline void init_console_ptr(void *storage, u32 total_space)
+static inline void init_console_ptr(void *storage, u32 total_space, int flags)
{
struct cbmem_console *cbm_cons_p = storage;
- /* Initialize the cache-as-ram pointer and underlying structure. */
- car_set_var(cbmem_console_p, cbm_cons_p);
- cbm_cons_p->buffer_size = total_space - sizeof(struct cbmem_console);
- cbm_cons_p->buffer_cursor = 0;
+ if (!cbm_cons_p) {
+ current_console_set(NULL);
+ return;
+ }
+
+ if (flags & CBMEMC_RESET) {
+ cbm_cons_p->buffer_size = total_space - sizeof(struct cbmem_console);
+ cbm_cons_p->buffer_cursor = 0;
+ }
+ if (flags & CBMEMC_APPEND) {
+ struct cbmem_console *tmp_cons_p = current_console();
+ if (tmp_cons_p)
+ copy_console_buffer(tmp_cons_p, cbm_cons_p);
+ }
+
+ current_console_set(cbm_cons_p);
}
void cbmemc_init(void)
{
#ifdef __PRE_RAM__
+ int flags = CBMEMC_RESET;
+
+ /* Do not clear output from bootblock. */
+ if (ENV_ROMSTAGE && !IS_ENABLED(CONFIG_CACHE_AS_RAM))
+ if (IS_ENABLED(CONFIG_BOOTBLOCK_CONSOLE))
+ flags = 0;
+
init_console_ptr(&preram_cbmem_console,
- CONFIG_CONSOLE_PRERAM_BUFFER_SIZE);
+ CONFIG_CONSOLE_PRERAM_BUFFER_SIZE, flags);
#else
/*
* Initializing before CBMEM is available, use static buffer to store
* the log.
*/
- init_console_ptr(static_console, sizeof(static_console));
+ init_console_ptr(static_console, sizeof(static_console), CBMEMC_RESET);
#endif
}
@@ -119,13 +145,11 @@ void cbmemc_tx_byte(unsigned char data)
* If there is overflow - add to the destination area a string, reporting the
* overflow and the number of dropped characters.
*/
-static void copy_console_buffer(struct cbmem_console *new_cons_p)
+static void copy_console_buffer(struct cbmem_console *old_cons_p,
+ struct cbmem_console *new_cons_p)
{
u32 copy_size, dropped_chars;
u32 cursor = new_cons_p->buffer_cursor;
- struct cbmem_console *old_cons_p;
-
- old_cons_p = current_console();
if (old_cons_p->buffer_cursor < old_cons_p->buffer_size)
copy_size = old_cons_p->buffer_cursor;
@@ -187,35 +211,21 @@ static void copy_console_buffer(struct cbmem_console *new_cons_p)
void cbmemc_reinit(void)
{
struct cbmem_console *cbm_cons_p = NULL;
+ int flags = CBMEMC_APPEND;
-#ifdef __PRE_RAM__
- if (IS_ENABLED(CONFIG_BROKEN_CAR_MIGRATE))
+ if (ENV_ROMSTAGE && (CONFIG_CONSOLE_PRERAM_BUFFER_SIZE == 0))
return;
-#endif
-
-#ifndef __PRE_RAM__
- cbm_cons_p = cbmem_find(CBMEM_ID_CONSOLE);
-#endif
-
- if (!cbm_cons_p) {
- cbm_cons_p = cbmem_add(CBMEM_ID_CONSOLE,
- CONFIG_CONSOLE_CBMEM_BUFFER_SIZE);
-
- if (!cbm_cons_p) {
- current_console_set(NULL);
- return;
- }
- cbm_cons_p->buffer_size = CONFIG_CONSOLE_CBMEM_BUFFER_SIZE -
- sizeof(struct cbmem_console);
+ /* If CBMEM entry already existed, old contents is not altered. */
+ cbm_cons_p = cbmem_add(CBMEM_ID_CONSOLE,
+ CONFIG_CONSOLE_CBMEM_BUFFER_SIZE);
- cbm_cons_p->buffer_cursor = 0;
- }
+ /* Clear old contents of CBMEM buffer. */
+ if (ENV_ROMSTAGE || (CONFIG_CONSOLE_PRERAM_BUFFER_SIZE == 0))
+ flags |= CBMEMC_RESET;
- copy_console_buffer(cbm_cons_p);
-
- current_console_set(cbm_cons_p);
+ init_console_ptr(cbm_cons_p,
+ CONFIG_CONSOLE_CBMEM_BUFFER_SIZE, flags);
}
-
/* Call cbmemc_reinit() at CAR migration time. */
CAR_MIGRATE(cbmemc_reinit)
More information about the coreboot-gerrit
mailing list