diff options
Diffstat (limited to 'qemu/roms/u-boot/doc/README.vxworks')
| -rw-r--r-- | qemu/roms/u-boot/doc/README.vxworks | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/doc/README.vxworks b/qemu/roms/u-boot/doc/README.vxworks new file mode 100644 index 000000000..4cb302e7f --- /dev/null +++ b/qemu/roms/u-boot/doc/README.vxworks @@ -0,0 +1,19 @@ +From VxWorks 6.9+ (not include 6.9), VxWorks starts adopting device tree as its hardware +decription mechansim (for PowerPC and ARM), thus requiring boot interface changes. +This section will describe the new interface. + +For PowerPC, the calling convention of the new VxWorks entry point conforms to the ePAPR standard, +which is shown below (see ePAPR for more details): + + void (*kernel_entry)(fdt_addr, + 0, 0, EPAPR_MAGIC, boot_IMA, 0, 0) + +For ARM, the calling convention is show below: + + void (*kernel_entry)(void *fdt_addr) + +When booting new VxWorks kernel (uImage format), the parameters passed to bootm is like below: + + bootm <kernel image address> - <device tree address> + +The do_bootvx command still works as it was for older VxWorks kernels. |