diff options
| author | Len Brown <len.brown@intel.com> | 2005-09-08 01:45:47 -0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2005-09-08 01:45:47 -0400 |
| commit | 64e47488c913ac704d465a6af86a26786d1412a5 (patch) | |
| tree | d3b0148592963dcde26e4bb35ddfec8b1eaf8e23 /arch/i386/kernel/head.S | |
| parent | 4a35a46bf1cda4737c428380d1db5d15e2590d18 (diff) | |
| parent | caf39e87cc1182f7dae84eefc43ca14d54c78ef9 (diff) | |
Merge linux-2.6 with linux-acpi-2.6
Diffstat (limited to 'arch/i386/kernel/head.S')
| -rw-r--r-- | arch/i386/kernel/head.S | 48 |
1 files changed, 26 insertions, 22 deletions
diff --git a/arch/i386/kernel/head.S b/arch/i386/kernel/head.S index 4477bb107098..0480ca9e9e57 100644 --- a/arch/i386/kernel/head.S +++ b/arch/i386/kernel/head.S @@ -77,6 +77,32 @@ ENTRY(startup_32) subl %edi,%ecx shrl $2,%ecx rep ; stosl +/* + * Copy bootup parameters out of the way. + * Note: %esi still has the pointer to the real-mode data. + * With the kexec as boot loader, parameter segment might be loaded beyond + * kernel image and might not even be addressable by early boot page tables. + * (kexec on panic case). Hence copy out the parameters before initializing + * page tables. + */ + movl $(boot_params - __PAGE_OFFSET),%edi + movl $(PARAM_SIZE/4),%ecx + cld + rep + movsl + movl boot_params - __PAGE_OFFSET + NEW_CL_POINTER,%esi + andl %esi,%esi + jnz 2f # New command line protocol + cmpw $(OLD_CL_MAGIC),OLD_CL_MAGIC_ADDR + jne 1f + movzwl OLD_CL_OFFSET,%esi + addl $(OLD_CL_BASE_ADDR),%esi +2: + movl $(saved_command_line - __PAGE_OFFSET),%edi + movl $(COMMAND_LINE_SIZE/4),%ecx + rep + movsl +1: /* * Initialize page tables. This creates a PDE and a set of page @@ -214,28 +240,6 @@ ENTRY(startup_32_smp) */ call setup_idt -/* - * Copy bootup parameters out of the way. - * Note: %esi still has the pointer to the real-mode data. - */ - movl $boot_params,%edi - movl $(PARAM_SIZE/4),%ecx - cld - rep - movsl - movl boot_params+NEW_CL_POINTER,%esi - andl %esi,%esi - jnz 2f # New command line protocol - cmpw $(OLD_CL_MAGIC),OLD_CL_MAGIC_ADDR - jne 1f - movzwl OLD_CL_OFFSET,%esi - addl $(OLD_CL_BASE_ADDR),%esi -2: - movl $saved_command_line,%edi - movl $(COMMAND_LINE_SIZE/4),%ecx - rep - movsl -1: checkCPUtype: movl $-1,X86_CPUID # -1 for no CPUID initially |