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 c22bf3b40bdffe03bce262cf1669af8d68dae69c 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 | 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)
-
Kyösti Mälkki