Kyösti Mälkki (kyosti.malkki@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@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@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)