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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/*
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* pci.c
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*
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* Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
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* Author: Fuxin Zhang, zhangfx@lemote.com
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <asm/mips-boards/bonito64.h>
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extern struct pci_ops bonito64_pci_ops;
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static struct resource loongson2e_pci_mem_resource = {
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.name = "LOONGSON2E PCI MEM",
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.start = 0x14000000UL,
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.end = 0x1fffffffUL,
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.flags = IORESOURCE_MEM,
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};
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static struct resource loongson2e_pci_io_resource = {
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.name = "LOONGSON2E PCI IO MEM",
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.start = 0x00004000UL,
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.end = IO_SPACE_LIMIT,
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.flags = IORESOURCE_IO,
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};
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static struct pci_controller loongson2e_pci_controller = {
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.pci_ops = &bonito64_pci_ops,
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.io_resource = &loongson2e_pci_io_resource,
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.mem_resource = &loongson2e_pci_mem_resource,
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.mem_offset = 0x00000000UL,
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.io_offset = 0x00000000UL,
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};
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static void __init ict_pcimap(void)
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{
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/*
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* local to PCI mapping: [256M,512M] -> [256M,512M]; differ from PMON
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*
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* CPU address space [256M,448M] is window for accessing pci space
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* we set pcimap_lo[0,1,2] to map it to pci space [256M,448M]
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* pcimap: bit18,pcimap_2; bit[17-12],lo2;bit[11-6],lo1;bit[5-0],lo0
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*/
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/* 1,00 0110 ,0001 01,00 0000 */
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BONITO_PCIMAP = 0x46140;
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/* 1, 00 0010, 0000,01, 00 0000 */
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/* BONITO_PCIMAP = 0x42040; */
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/*
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* PCI to local mapping: [2G,2G+256M] -> [0,256M]
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*/
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BONITO_PCIBASE0 = 0x80000000;
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BONITO_PCIBASE1 = 0x00800000;
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BONITO_PCIBASE2 = 0x90000000;
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}
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static int __init pcibios_init(void)
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{
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ict_pcimap();
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register_pci_controller(&loongson2e_pci_controller);
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return 0;
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}
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arch_initcall(pcibios_init);
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