diff options
Diffstat (limited to 'src/lib/cbmem_console.c')
| -rw-r--r-- | src/lib/cbmem_console.c | 80 |
1 files changed, 45 insertions, 35 deletions
diff --git a/src/lib/cbmem_console.c b/src/lib/cbmem_console.c index a8195a6a3d..6783b30dae 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) |