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| author | Simon Glass <sjg@chromium.org> | 2014-07-10 22:23:26 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2014-08-04 05:23:59 -0600 |
| commit | aae2aef9c807a13ec9074efe48fae5bb5e3c6039 (patch) | |
| tree | 3b537768461423e5eccec8cc43aa5a47d423189b /arch/arm/lib | |
| parent | 25b4adbba018633b943a99322bfb2fb819c0bafb (diff) | |
| download | u-boot-imx-aae2aef9c807a13ec9074efe48fae5bb5e3c6039.zip u-boot-imx-aae2aef9c807a13ec9074efe48fae5bb5e3c6039.tar.gz u-boot-imx-aae2aef9c807a13ec9074efe48fae5bb5e3c6039.tar.bz2 | |
arm: Set up global data before board_init_f()
At present arm defines CONFIG_SYS_GENERIC_GLOBAL_DATA, meaning that
the global_data pointer is set up in board_init_f(). However it is
actually set up before this, it just isn't zeroed.
If we zero the global data before calling board_init_f() then we
don't need to define CONFIG_SYS_GENERIC_GLOBAL_DATA.
Make this change (on arm32 only) to simplify the init process. I
don't have the ability to test aarch64 yet.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Tom Rini <trini@ti.com>
Diffstat (limited to 'arch/arm/lib')
| -rw-r--r-- | arch/arm/lib/crt0.S | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/lib/crt0.S b/arch/arm/lib/crt0.S index dfc2de9..43aa212 100644 --- a/arch/arm/lib/crt0.S +++ b/arch/arm/lib/crt0.S @@ -67,10 +67,19 @@ ENTRY(_main) ldr sp, =(CONFIG_SYS_INIT_SP_ADDR) #endif bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ + mov r2, sp sub sp, sp, #GD_SIZE /* allocate one GD above SP */ bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ mov r9, sp /* GD is above SP */ + mov r1, sp mov r0, #0 +clr_gd: + cmp r1, r2 /* while not at end of GD */ + strlo r0, [r1] /* clear 32-bit GD word */ + addlo r1, r1, #4 /* move to next */ + blo clr_gd + + /* mov r0, #0 not needed due to above code */ bl board_init_f #if ! defined(CONFIG_SPL_BUILD) |