motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-04 16:23:55 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

ppc/pnv/phb4: Add pervasive chiplet support to PHB4/5

Browse source 
Each non-core chiplet on a chip has a "pervasive chiplet" unit and its
xscom register set. This adds support for PHB4/5.

skiboot reads the CPLT_CONF1 register in __phb4/5_get_max_link_width(),
which shows up as unimplemented xscom reads. Set a value in PCI CONF1
register's link-width field to demonstrate skiboot doing something
interesting with it.

In the bigger picture, it might be better to model the pervasive
chiplet type as parent that each non-core chiplet model derives from.
For now this is enough to get the PHB registers implemented and working
for skiboot, and provides a second example (after the N1 chiplet) that
will help if the design is reworked as such.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
This commit is contained in:
Nicholas Piggin 2024-11-16 20:19:19 +10:00
parent 7f98b4f25e
commit 6b56bb6dbc
4 changed files with 71 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

4
include/hw/ppc/pnv_xscom.h
View file

@ -126,6 +126,8 @@ struct PnvXScomInterfaceClass {
#define PNV9_XSCOM_PEC_PCI_BASE 0xd010800
#define PNV9_XSCOM_PEC_PCI_SIZE 0x200
#define PNV9_XSCOM_PEC_NEST_CPLT_BASE 0x0d000000
/* XSCOM PCI "pass-through" window to PHB SCOM */
#define PNV9_XSCOM_PEC_PCI_STK0 0x100
#define PNV9_XSCOM_PEC_PCI_STK1 0x140
@ -197,6 +199,8 @@ struct PnvXScomInterfaceClass {
#define PNV10_XSCOM_PEC_NEST_BASE 0x3011800 /* index goes downwards ... */
#define PNV10_XSCOM_PEC_NEST_SIZE 0x100
#define PNV10_XSCOM_PEC_NEST_CPLT_BASE 0x08000000
#define PNV10_XSCOM_PEC_PCI_BASE 0x8010800 /* index goes upwards ... */
#define PNV10_XSCOM_PEC_PCI_SIZE 0x200