Convert CONSOLE_PRE_CONSOLE_BUFFER options to Kconfig

[u-boot] / common / Kconfig

diff --git a/common/Kconfig b/common/Kconfig
index a8dfd7c2e2cbaaf00630295bb7b122c1a22fc79e..7988de278b605b6348fcf4ef37a34e4f5d5ddc81 100644 (file)
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -246,6 +246,48 @@ config SILENT_CONSOLE_UPDATE_ON_RELOC
          (e.g. NAND). This option makes the value of the 'silent'
          environment variable take effect at relocation.
 
+config PRE_CONSOLE_BUFFER
+       bool "Buffer characters before the console is available"
+       help
+         Prior to the console being initialised (i.e. serial UART
+         initialised etc) all console output is silently discarded.
+         Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to
+         buffer any console messages prior to the console being
+         initialised to a buffer. The buffer is a circular buffer, so
+         if it overflows, earlier output is discarded.
+
+         Note that this is not currently supported in SPL. It would be
+         useful to be able to share the pre-console buffer with SPL.
+
+config PRE_CON_BUF_SZ
+       int "Sets the size of the pre-console buffer"
+       depends on PRE_CONSOLE_BUFFER
+       default 4096
+       help
+         The size of the pre-console buffer affects how much console output
+         can be held before it overflows and starts discarding earlier
+         output. Normally there is very little output at this early stage,
+         unless debugging is enabled, so allow enough for ~10 lines of
+         text.
+
+         This is a useful feature if you are using a video console and
+         want to see the full boot output on the console. Without this
+         option only the post-relocation output will be displayed.
+
+config PRE_CON_BUF_ADDR
+       hex "Address of the pre-console buffer"
+       depends on PRE_CONSOLE_BUFFER
+       default 0x2f000000 if ARCH_SUNXI && MACH_SUN9I
+       default 0x4f000000 if ARCH_SUNXI && !MACH_SUN9I
+       help
+         This sets the start address of the pre-console buffer. This must
+         be in available memory and is accessed before relocation and
+         possibly before DRAM is set up. Therefore choose an address
+         carefully.
+
+         We should consider removing this option and allocating the memory
+         in board_init_f_init_reserve() instead.
+
 endmenu
 
 config SYS_NO_FLASH