[coreboot-gerrit] Patch set updated for coreboot: f1d2d9c CBMEM console: Fix and enhance pre-RAM support
Kyösti Mälkki (kyosti.malkki@gmail.com)
gerrit at coreboot.org
Thu Jan 1 12:50:29 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 f1d2d9c1ffe0c55be1dda2b00eff146a5e32f8ad
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 | 12 +++++-
src/include/console/cbmem_console.h | 3 +-
src/lib/Makefile.inc | 1 +
src/lib/cbmem_console.c | 79 +++++++++++++++++++++----------------
10 files changed, 63 insertions(+), 46 deletions(-)
diff --git a/src/arch/arm/Kconfig b/src/arch/arm/Kconfig
index e946f59..edc4b12 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..6d9bf1e 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
@@ -184,16 +185,23 @@ 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"
default 0xc00
+ depends on CONSOLE_PRERAM_BUFFER_BASE != 0xabadbeef
help
Console is used before RAM is initialized. This is the room reserved
in the DCACHE based RAM, SRAM, etc. to keep console output before it
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 ec3c2f4..e35116b 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 630d9c9..5f8ff0c 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)
{
struct cbmem_console *cbm_cons_p = car_get_var(cbmem_console_p);
@@ -79,27 +86,45 @@ 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_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
}
@@ -125,13 +150,11 @@ 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;
@@ -193,35 +216,21 @@ 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)
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