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Default to bootm_size() when CONFIG_SYS_BOOTMAPSZ is not defined

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This patch adds a function getenv_bootm_mapsize() for obtaining the
size of the early mapped region accessible by the kernel during early
boot.  It defaults to CONFIG_SYS_BOOTMAPSZ, or if not defined,
defaults to getenv_bootm_size(), which in turn defaults to the size of
RAM.

getenv_bootm_mapsize() can also be overridden with a "bootm_mapsize"
environmental variable.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
This commit is contained in:
Grant Likely 2011-03-28 09:58:43 +00:00 • committed by Gerald Van Baren
parent 590d3cacb9
commit c3624e6ed0
4 changed files with 35 additions and 6 deletions
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2
arch/powerpc/lib/bootm.c
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@ -96,7 +96,7 @@ static void boot_jump_linux(bootm_headers_t *images)
debug (" Booting using OF flat tree...\n");
WATCHDOG_RESET ();
(*kernel) ((bd_t *)of_flat_tree, 0, 0, EPAPR_MAGIC,
CONFIG_SYS_BOOTMAPSZ, 0, 0);
getenv_bootm_mapsize(), 0, 0);
/* does not return */
} else
#endif