u-boot.git/arch/x86/include/asm/cpu.h, branch v2016.01

x86: Add a way to call 32-bit code from 64-bit mode

2015-08-05T14:44:07+00:00

The procedure to drop from 64-bit mode to 32-bit is a bit messy. Add a
function to take care of it. It requires identity-mapped pages and that
the calling code is running below 4GB.

Signed-off-by: Simon Glass 
Reviewed-by: Bin Meng

x86: Add an enum for some commonly-used GDT bits

2015-08-05T14:44:07+00:00

Rather than add these as open-coded values, create an enum with the commonly
used flags.

Signed-off-by: Simon Glass 
Reviewed-by: Bin Meng

x86: dm: Clean up cpu drivers

2015-07-15T00:03:15+00:00

This commit does the following to clean up x86 cpu dm drivers:
- Move cpu_x86 driver codes from arch/x86/cpu/cpu.c to a dedicated
  file arch/x86/cpu/cpu_x86.c
- Rename x86_cpu_get_desc() to cpu_x86_get_desc() to keep consistent
  naming with other dm drivers
- Add a new cpu_x86_bind() in the cpu_x86 driver which does exactly
  the same as the one in the intel baytrail cpu driver
- Update intel baytrail cpu driver to use cpu_x86_get_desc() and
  cpu_x86_bind()

Signed-off-by: Bin Meng 
Acked-by: Simon Glass

x86: Allow CPUs to be set up after relocation

2015-04-30T22:13:48+00:00

This permits init of additional CPU cores after relocation and when driver
model is ready.

Signed-off-by: Simon Glass 
Reviewed-by: Bin Meng

x86: Add an mfence macro

2015-04-30T03:02:34+00:00

Provide access to this x86 instruction from C code.

Signed-off-by: Simon Glass 
Reviewed-by: Bin Meng

x86: Replace fill_processor_name() with cpu_get_name()

2014-11-21T06:24:12+00:00

This implementation has a 'cpu' prefix and returns a pointer to the string,
avoiding the need for copying.

Signed-off-by: Simon Glass 
Reviewed-by: Bin Meng

x86: Do CPU identification in the early phase

2014-11-21T06:24:10+00:00

The CPU identification happens in x86_cpu_init_f() and corresponding
fields are saved in the global data for later use.

Signed-off-by: Bin Meng

x86: Add support for starting 64-bit kernel

2014-10-29T02:43:47+00:00

Add code to jump to a 64-bit Linux kernel. We need to set up a flat page
table structure, a new GDT and then go through a few hoops in the right
order.

Signed-off-by: Simon Glass

x86: Display basic CPU information on boot

2014-10-29T02:42:56+00:00

Display the type of CPU (x86 or x86_64) when starting up.

Signed-off-by: Simon Glass

x86: Move paging functions into cpu.c

2014-10-29T02:42:51+00:00

These functions really don't belong in physmem as they relate to the
cpu. Move them.

Signed-off-by: Simon Glass