tree 00347ff61aa822038cc2a3b8f1adc6ef02459d43
parent 673d2595d4f773cc266cbf8dbaf2f475a6adb949
author Helge Deller <deller@gmx.de> 1694584643 +0200
committer Helge Deller <deller@gmx.de> 1694584643 +0200

parisc: Implement Block-TLB (BTLB) support for 32-bit CPUs

SeaBIOS has no information about the lower implementation details for
Block-TLB (or generic TLB) support, so it simply hands over the
parameters in the CPU registers provided by the operating system to the
PDC_BLOCK_TLB PDC function to QEMU.

Calling QEMU happens via a diagnostics instruction (diag 0x100) which
QEMU will respond to. Older QEMU versions without the BTLB support will
simply log that they ignored the diag instruction, and SeaBIOS will
return PDC_BAD_OPTION for this PDC call in that case.

Signed-off-by: Helge Deller <deller@gmx.de>