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doc: fix README.standalone

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Since commit fe1378a961 (ARM: use r9 for gd), r9 register
is used on ARM to hold global_data.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Jeroen Hofstee <jeroen@myspectrum.nl>
This commit is contained in:
Masahiro Yamada 2014-10-22 00:41:49 +09:00 • committed by Tom Rini
parent 17da712024
commit 6a10560ce7
1 changed files with 1 additions and 1 deletions
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doc/README.standalone
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@ -21,7 +21,7 @@ Design Notes on Exporting U-Boot Functions to Standalone Applications:
2. The pointer to the jump table is passed to the application in a 2. The pointer to the jump table is passed to the application in a
machine-dependent way. PowerPC, ARM, MIPS, Blackfin and Nios II machine-dependent way. PowerPC, ARM, MIPS, Blackfin and Nios II
architectures use a dedicated register to hold the pointer to the architectures use a dedicated register to hold the pointer to the
'global_data' structure: r2 on PowerPC, r8 on ARM, k0 on MIPS, 'global_data' structure: r2 on PowerPC, r9 on ARM, k0 on MIPS,
P3 on Blackfin and gp on Nios II. The x86 architecture does not P3 on Blackfin and gp on Nios II. The x86 architecture does not
use such a register; instead, the pointer to the 'global_data' use such a register; instead, the pointer to the 'global_data'
structure is passed as 'argv[-1]' pointer. structure is passed as 'argv[-1]' pointer.