diff options
Diffstat (limited to 'src/cpu/x86/copy_data_section.inc')
| -rw-r--r-- | src/cpu/x86/copy_data_section.inc | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/cpu/x86/copy_data_section.inc b/src/cpu/x86/copy_data_section.inc new file mode 100644 index 000000000000..dccb8d39755a --- /dev/null +++ b/src/cpu/x86/copy_data_section.inc @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#if ENV_SEPARATE_DATA_AND_BSS + +/* + * Copy .data section content to Cache-As-Ram. + * This code can be included from 32 bits or 64 bits code. It also preserves + * registers. + */ +copy_data_section: +#if ENV_X86_64 + push %rcx + push %rdi + push %rsi +#else + pushl %ecx + pushl %edi + pushl %esi +#endif + + movl $(_edata), %ecx + movl $(_data), %edi + sub %edi, %ecx + movl $(_data_load),%esi + shrl $2, %ecx + rep movsl + +#if ENV_X86_64 + pop %rsi + pop %rdi + pop %rcx +#else + popl %esi + popl %edi + popl %ecx +#endif + +#endif /* ENV_SEPARATE_DATA_AND_BSS */ |