diff options
| author | Graeme Russ <graeme.russ@gmail.com> | 2011-09-01 00:52:06 +0000 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2011-10-04 14:48:19 -0700 |
| commit | 74e9c40925267986a64d174b8a82bb249e131c16 (patch) | |
| tree | 3e7d5abb8588b018fe2593f4de68a156b5b9b583 /arch/nios2 | |
| parent | 56380ae05fc0b667d753528f764f3bb1144627c4 (diff) | |
console: Implement pre-console buffer
Allow redirection of console output prior to console initialisation to a
temporary buffer.
To enable this functionality, the board (or arch) must define:
- CONFIG_PRE_CONSOLE_BUFFER - Enable pre-console buffer
- CONFIG_PRE_CON_BUF_ADDR - Base address of pre-console buffer
- CONFIG_PRE_CON_BUF_SZ - Size of pre-console buffer (in bytes)
The pre-console buffer will buffer the last CONFIG_PRE_CON_BUF_SZ bytes
Any earlier characters are silently dropped.
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
Change-Id: I3c4caad276b9e981ebea0a0fb79d85ee3a3bcb7d
Reviewed-on: http://gerrit.chromium.org/gerrit/8686
Reviewed-by: Che-Liang Chiou <clchiou@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch/nios2')
| -rw-r--r-- | arch/nios2/include/asm/global_data.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/nios2/include/asm/global_data.h b/arch/nios2/include/asm/global_data.h index 2c4a719409..d9f06645a3 100644 --- a/arch/nios2/include/asm/global_data.h +++ b/arch/nios2/include/asm/global_data.h @@ -29,6 +29,9 @@ typedef struct global_data { unsigned long baudrate; unsigned long cpu_clk; /* CPU clock in Hz! */ unsigned long have_console; /* serial_init() was called */ +#ifdef CONFIG_PRE_CONSOLE_BUFFER + unsigned long precon_buf_idx; /* Pre-Console buffer index */ +#endif phys_size_t ram_size; /* RAM size */ unsigned long env_addr; /* Address of Environment struct */ unsigned long env_valid; /* Checksum of Environment valid */ |