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dm: x86: Support pre-reloc malloc()

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Add support for this by reserving a block of memory below global_data.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2014-10-10 07:49:16 -06:00
parent fbd7282426
commit 5dbcaa2128
1 changed files with 7 additions and 0 deletions
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7
arch/x86/cpu/start.S
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@ -97,6 +97,13 @@ car_init_ret:
/* Reserve space for global descriptor table */ /* Reserve space for global descriptor table */
subl $X86_GDT_SIZE, %esp subl $X86_GDT_SIZE, %esp
#if defined(CONFIG_SYS_MALLOC_F_LEN)
subl $CONFIG_SYS_MALLOC_F_LEN, %esp
movl %eax, %edx
addl $GD_MALLOC_BASE, %edx
movl %esp, (%edx)
#endif
/* Align temporary global descriptor table to 16-byte boundary */ /* Align temporary global descriptor table to 16-byte boundary */
andl $0xfffffff0, %esp andl $0xfffffff0, %esp