From: Sheetal Tigadoli sheetal.tigadoli@broadcom.com
Allow ELOG to use DDR for logging.
Signed-off-by: Sheetal Tigadoli sheetal.tigadoli@broadcom.com Signed-off-by: Vladimir Olovyannikov vladimir.olovyannikov@broadcom.com --- common/Kconfig | 8 ++++++++ common/Makefile | 1 + common/bcm_elog.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++ common/console.c | 22 +++++++++++++++++++++ include/bcm_elog.h | 37 ++++++++++++++++++++++++++++++++++ 5 files changed, 117 insertions(+) create mode 100644 common/bcm_elog.c create mode 100644 include/bcm_elog.h
diff --git a/common/Kconfig b/common/Kconfig index d9ecf79e0a..f78296ec63 100644 --- a/common/Kconfig +++ b/common/Kconfig @@ -632,6 +632,14 @@ config SYS_STDIO_DEREGISTER removed (for example a USB keyboard) then this option can be enabled to ensure this is handled correctly.
+config BCM_ELOG + bool "Broadcom error logging support" + default n + help + Enables broadcom error logging support to be used with brcm + platforms, say Y to this option to enable the logging support. + If unsure, say N. + endmenu
menu "Logging" diff --git a/common/Makefile b/common/Makefile index 302d8beaf3..5f1338f281 100644 --- a/common/Makefile +++ b/common/Makefile @@ -95,6 +95,7 @@ else obj-$(CONFIG_SPL_SERIAL_SUPPORT) += console.o endif else +obj-$(CONFIG_BCM_ELOG) += bcm_elog.o obj-y += console.o endif # CONFIG_SPL_BUILD
diff --git a/common/bcm_elog.c b/common/bcm_elog.c new file mode 100644 index 0000000000..9f51636b24 --- /dev/null +++ b/common/bcm_elog.c @@ -0,0 +1,49 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2019 Broadcom + */ + +#include <bcm_elog.h> + +/* Log one character */ +int log2ddr(const char ch) +{ + u32 offset, len; + uintptr_t base = BCM_ELOG_UBOOT_BASE; + + offset = readl(base + BCM_ELOG_OFF_OFFSET); + len = readl(base + BCM_ELOG_LEN_OFFSET); + writeb(ch, base + offset); + offset++; + + /* log buffer is now full and need to wrap around */ + if (offset >= BCM_ELOG_UBOOT_SIZE) + offset = BCM_ELOG_HEADER_LEN; + + /* only increment length when log buffer is not full */ + if (len < BCM_ELOG_UBOOT_SIZE - BCM_ELOG_HEADER_LEN) + len++; + + writel(offset, base + BCM_ELOG_OFF_OFFSET); + writel(len, base + BCM_ELOG_LEN_OFFSET); + + return 0; +} + +/* Routine to initialize error logging */ +void bcm_elog_init(uintptr_t base, u32 size) +{ + u32 val; + + /* + * If a valid signature is found, it means logging is already + * initialize. In this case, we should not re-initialize the entry + * header in the designated memory + */ + val = readl(base + BCM_ELOG_SIG_OFFSET); + if (val != BCM_ELOG_SIG_VAL) { + writel(base + BCM_ELOG_SIG_OFFSET, BCM_ELOG_SIG_VAL); + writel(base + BCM_ELOG_OFF_OFFSET, BCM_ELOG_HEADER_LEN); + writel(base + BCM_ELOG_LEN_OFFSET, 0); + } +} diff --git a/common/console.c b/common/console.c index 168ba60d0d..25ebd6e431 100644 --- a/common/console.c +++ b/common/console.c @@ -20,6 +20,10 @@ #include <env_internal.h> #include <watchdog.h>
+#ifdef CONFIG_BCM_ELOG +#include <bcm_elog.h> +#endif + DECLARE_GLOBAL_DATA_PTR;
static int on_console(const char *name, const char *value, enum env_op op, @@ -536,6 +540,9 @@ void putc(const char c) if (!gd->have_console) return pre_console_putc(c);
+#ifdef CONFIG_BCM_ELOG + log2ddr(c); +#endif if (gd->flags & GD_FLG_DEVINIT) { /* Send to the standard output */ fputc(stdout, c); @@ -587,6 +594,17 @@ void puts(const char *s) if (!gd->have_console) return pre_console_puts(s);
+#ifdef CONFIG_BCM_ELOG + { + const char *tmp = s; + + while (*tmp) { + int c = *tmp++; + + log2ddr(c); + } + } +#endif if (gd->flags & GD_FLG_DEVINIT) { /* Send to the standard output */ fputs(stdout, s); @@ -776,6 +794,10 @@ int console_init_f(void)
print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT1_SERIAL);
+#ifdef CONFIG_BCM_ELOG + bcm_elog_init(BCM_ELOG_UBOOT_BASE, BCM_ELOG_UBOOT_SIZE); +#endif + return 0; }
diff --git a/include/bcm_elog.h b/include/bcm_elog.h new file mode 100644 index 0000000000..62352bf5a3 --- /dev/null +++ b/include/bcm_elog.h @@ -0,0 +1,37 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * (C) Copyright 2019 Broadcom + * + */ + +#ifndef __BCM_ELOG_H__ +#define __BCM_ELOG_H__ + +#include <asm/io.h> +#include <linux/types.h> + +/* Default AP error logging base address */ +#ifndef ELOG_AP_UART_LOG_BASE +#define ELOG_AP_UART_LOG_BASE 0x8f110000 +#endif + +/* Reserve 16K to store error logs */ +#define BCM_ELOG_UBOOT_BASE ELOG_AP_UART_LOG_BASE +#define BCM_ELOG_UBOOT_SIZE 0x4000 + +/* error logging signature */ +#define BCM_ELOG_SIG_OFFSET 0x0000 +#define BCM_ELOG_SIG_VAL 0x75767971 + +/* current logging offset that points to where new logs should be added */ +#define BCM_ELOG_OFF_OFFSET 0x0004 + +/* current logging length (excluding header) */ +#define BCM_ELOG_LEN_OFFSET 0x0008 + +#define BCM_ELOG_HEADER_LEN 12 + +int log2ddr(const char ch); +void bcm_elog_init(uintptr_t base, uint32_t size); + +#endif /* __BCM_ELOG_H__ */