diff options
author | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2008-02-15 11:00:23 (GMT) |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2008-04-17 15:40:47 (GMT) |
commit | 03ae5768b6110ebaa97dc3e7abf1c3d8bec5f874 (patch) | |
tree | e9dffa8c5eccd43ea8284d7e2e48b782166bbcac /arch/x86/kernel/vmlinux_64.lds.S | |
parent | bc7c314d7048017caa0725b41cc577cccf4fc53b (diff) | |
download | linux-fsl-qoriq-03ae5768b6110ebaa97dc3e7abf1c3d8bec5f874.tar.xz |
x86: use ELF section to list CPU vendor specific code
Replace the hardcoded list of initialization functions for each CPU
vendor by a list in an ELF section, which is read at initialization in
arch/x86/kernel/cpu/cpu.c to fill the cpu_devs[] array. The ELF
section, named .x86cpuvendor.init, is reclaimed after boot, and
contains entries of type "struct cpu_vendor_dev" which associates a
vendor number with a pointer to a "struct cpu_dev" structure.
This first modification allows to remove all the VENDOR_init_cpu()
functions.
This patch also removes the hardcoded calls to early_init_amd() and
early_init_intel(). Instead, we add a "c_early_init" member to the
cpu_dev structure, which is then called if not NULL by the generic CPU
initialization code. Unfortunately, in early_cpu_detect(), this_cpu is
not yet set, so we have to use the cpu_devs[] array directly.
This patch is part of the Linux Tiny project, and is needed for
further patch that will allow to disable compilation of unused CPU
support code.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/vmlinux_64.lds.S')
-rw-r--r-- | arch/x86/kernel/vmlinux_64.lds.S | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kernel/vmlinux_64.lds.S b/arch/x86/kernel/vmlinux_64.lds.S index 4c36945..b7ab3c3 100644 --- a/arch/x86/kernel/vmlinux_64.lds.S +++ b/arch/x86/kernel/vmlinux_64.lds.S @@ -177,6 +177,11 @@ SECTIONS *(.con_initcall.init) } __con_initcall_end = .; + __x86cpuvendor_start = .; + .x86cpuvendor.init : AT(ADDR(.x86cpuvendor.init) - LOAD_OFFSET) { + *(.x86cpuvendor.init) + } + __x86cpuvendor_end = .; SECURITY_INIT . = ALIGN(8); |