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| author | Bin Meng <bmeng.cn@gmail.com> | 2018-04-11 22:02:23 -0700 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2018-04-16 22:38:53 +0800 |
| commit | 7d9974a2bee01b133ec18f794467be74bc4d0587 (patch) | |
| tree | 8482789617fc8cc34be0866e51eb99619acbfb41 /doc/README.vxworks | |
| parent | 79c584e5595458d58dc1cf47172abcb3748574f4 (diff) | |
| download | u-boot-7d9974a2bee01b133ec18f794467be74bc4d0587.zip u-boot-7d9974a2bee01b133ec18f794467be74bc4d0587.tar.gz u-boot-7d9974a2bee01b133ec18f794467be74bc4d0587.tar.bz2 | |
doc: vxworks: Update x86 specific instructions
This updates the doc of booting VxWorks, like loading an x64 kernel,
and how to make VxWorks graphics console driver work.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'doc/README.vxworks')
| -rw-r--r-- | doc/README.vxworks | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/doc/README.vxworks b/doc/README.vxworks index 3f9b8c1..3239c5b 100644 --- a/doc/README.vxworks +++ b/doc/README.vxworks @@ -17,8 +17,6 @@ For booting old kernels (6.9.x) on PowerPC and ARM, and all kernel versions on other architectures, 'bootvx' shall be used. For booting VxWorks 7 kernels on PowerPC and ARM, 'bootm' shall be used. -64-bit x86 kernel cannot be loaded as of today. - VxWorks 7 on PowerPC and ARM --------------------------- From VxWorks 7, VxWorks starts adopting device tree as its hardware decription @@ -79,3 +77,22 @@ For boards on which ACPI is not supported by U-Boot yet, VxWorks kernel must be configured to use MP table and virtual wire interrupt mode. This requires INCLUDE_MPTABLE_BOOT_OP and INCLUDE_VIRTUAL_WIRE_MODE to be included in a VxWorks kernel configuration. + +Both 32-bit x86 and 64-bit x64 kernels can be loaded. + +There are two types of graphics console drivers in VxWorks. One is the 80x25 +VGA text mode driver. The other one is the EFI console bitmapped graphics mode +driver. To make these drivers function, U-Boot needs to load and run the VGA +BIOS of the graphics card first. + + - If the kernel is configured with 80x25 VGA text mode driver, + CONFIG_FRAMEBUFFER_SET_VESA_MODE must be unset in U-Boot. + - If the kernel is configured with bitmapped graphics mode driver, + CONFIG_FRAMEBUFFER_SET_VESA_MODE need remain set but care must be taken + at which VESA mode is to be set. The supported pixel format is 32-bit + RGBA, hence the available VESA mode can only be one of the following: + * FRAMEBUFFER_VESA_MODE_10F + * FRAMEBUFFER_VESA_MODE_112 + * FRAMEBUFFER_VESA_MODE_115 + * FRAMEBUFFER_VESA_MODE_118 + * FRAMEBUFFER_VESA_MODE_11B |