Browse Source

x86: doc: Remove stale sections of 64-bit support

There are some sections in current doc saying 64-bit is unsupported.
This apparently is out of date. Remove it.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Bin Meng 3 years ago
parent
commit
0e028bf970
1 changed files with 0 additions and 17 deletions
  1. 0 17
      doc/README.x86

+ 0 - 17
doc/README.x86

@@ -1160,27 +1160,10 @@ to load a 'u-boot-payload.efi', see below test logs on QEMU.
1160 1160
 
1161 1161
 See README.u-boot_on_efi and README.uefi for details of EFI support in U-Boot.
1162 1162
 
1163
-64-bit Support
1164
---------------
1165
-U-Boot supports booting a 64-bit kernel directly and is able to change to
1166
-64-bit mode to do so. However, U-Boot itself is currently always built
1167
-in 32-bit mode. Some access to the full memory range is provided with
1168
-arch_phys_memset().
1169
-
1170
-The development work to make U-Boot itself run in 64-bit mode has not yet
1171
-been attempted. The best approach would likely be to build a 32-bit SPL
1172
-image for U-Boot, with CONFIG_SPL_BUILD. This could then handle the early CPU
1173
-init in 16-bit and 32-bit mode, running the FSP and any other binaries that
1174
-are needed. Then it could change to 64-bit model and jump to U-Boot proper.
1175
-
1176
-Given U-Boot's extensive 64-bit support this has not been a high priority,
1177
-but it would be a nice addition.
1178
-
1179 1163
 TODO List
1180 1164
 ---------
1181 1165
 - Audio
1182 1166
 - Chrome OS verified boot
1183
-- Building U-Boot to run in 64-bit mode
1184 1167
 
1185 1168
 References
1186 1169
 ----------