Patch set updated for serialice: 7b39191 Add support for extended PCI config space via 0xcf8

[Rudolf Marek]

Rudolf Marek (r.marek(a)assembler.cz) just uploaded a new patch set to gerrit, which you can
find at http://review.coreboot.org/1912

-gerrit

commit 7b391912b225d3d0d657164623a4e14d050533fa
Author: Rudolf Marek <r.marek(a)assembler.cz>
Date:   Sun Nov 25 19:55:01 2012 +0100

    Add support for extended PCI config space via 0xcf8
    
    Some chipsets allows on request an access to extended PCI
    config space 0 - 4096. Lets add them to the decoder.
    There is no generic limitation for number of busses,
    but this mechanism is used as the backdoor to chipset
    extended PCI regs.
    
    Change-Id: Ie446104c86916f719bc0230d5e9ce2f8a49cceb1
    Signed-off-by: Rudolf Marek <r.marek(a)assembler.cz>
---
 SerialICE/simba/pci_cfg.lua | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/SerialICE/simba/pci_cfg.lua b/SerialICE/simba/pci_cfg.lua
index 88ea266..47a061d 100644
--- a/SerialICE/simba/pci_cfg.lua
+++ b/SerialICE/simba/pci_cfg.lua
@@ -151,7 +151,7 @@ function pci_cfg_print(f, action, bdfr)
 		dir_str = "<="
 	end
 
-	printk(f, action, "%x:%02x.%x [%02x] %s %s\n",
+	printk(f, action, "%x:%02x.%x [%03x] %s %s\n",
 		bit32.band(0xff,bit32.rshift(bdfr, 20)), bit32.band(0x1f,bit32.rshift(bdfr, 15)),
 		bit32.band(0x7,bit32.rshift(bdfr, 12)), bit32.band(0xfff,bdfr),
 		dir_str, size_data(action.size, action.data))
@@ -239,8 +239,14 @@ function pci_io_cfg_pre(f, action)
 				new_parent_action()
 			end
 			local bdfr = 0
+			-- BDFR is like normal BDF but reg has 12 bits to cover all extended space
+			-- Copy bus/device/function
 			bdfr = bit32.lshift(action.data, 4)
-			bdfr = bit32.band(bdfr, 0xfffff000)
+			bdfr = bit32.band(bdfr, 0x0ffff000)
+			-- Some chipsets allows (on request) performing extended register space access
+			-- Usually using bits 27:24, copy that to right place
+			bdfr = bit32.bor(bdfr, bit32.band(0xf00, bit32.rshift(action.data, 24 - 8)))
+			-- Add the classic PCI register
 			bdfr = bit32.bor(bdfr, bit32.band(action.data, 0xfc))
 			pci_cfg_select(f, bdfr)
 		end