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MIPS: Loongson64: Drop setup_pcimap

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setup_pcimap is used to setup address windows for Loongson-3
built-in PCI-X controller, but this function is never been used
in the real world and lack of support in kernel.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: chenhe@lemote.com
This commit is contained in:
Jiaxun Yang 2019-11-07 12:01:18 +08:00 committed by Paul Burton
parent 574b9a04ab
commit 53949e0a65
No known key found for this signature in database
GPG Key ID: 3EA79FACB57500DD
1 changed files with 0 additions and 43 deletions
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43
arch/mips/loongson64/pci.c
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@ -31,54 +31,11 @@ static struct pci_controller loongson_pci_controller = {
.io_offset = 0x00000000UL,
};
static void __init setup_pcimap(void)
{
/*
* local to PCI mapping for CPU accessing PCI space
* CPU address space [256M,448M] is window for accessing pci space
* we set pcimap_lo[0,1,2] to map it to pci space[0M,64M], [320M,448M]
*
* pcimap: PCI_MAP2 PCI_Mem_Lo2 PCI_Mem_Lo1 PCI_Mem_Lo0
* [<2G] [384M,448M] [320M,384M] [0M,64M]
*/
LOONGSON_PCIMAP = LOONGSON_PCIMAP_PCIMAP_2 |
LOONGSON_PCIMAP_WIN(2, LOONGSON_PCILO2_BASE) |
LOONGSON_PCIMAP_WIN(1, LOONGSON_PCILO1_BASE) |
LOONGSON_PCIMAP_WIN(0, 0);
/*
* PCI-DMA to local mapping: [2G,2G+256M] -> [0M,256M]
*/
LOONGSON_PCIBASE0 = 0x80000000ul; /* base: 2G -> mmap: 0M */
/* size: 256M, burst transmission, pre-fetch enable, 64bit */
LOONGSON_PCI_HIT0_SEL_L = 0xc000000cul;
LOONGSON_PCI_HIT0_SEL_H = 0xfffffffful;
LOONGSON_PCI_HIT1_SEL_L = 0x00000006ul; /* set this BAR as invalid */
LOONGSON_PCI_HIT1_SEL_H = 0x00000000ul;
LOONGSON_PCI_HIT2_SEL_L = 0x00000006ul; /* set this BAR as invalid */
LOONGSON_PCI_HIT2_SEL_H = 0x00000000ul;
/* avoid deadlock of PCI reading/writing lock operation */
LOONGSON_PCI_ISR4C = 0xd2000001ul;
/* can not change gnt to break pci transfer when device's gnt not
deassert for some broken device */
LOONGSON_PXARB_CFG = 0x00fe0105ul;
#ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG
/*
* set cpu addr window2 to map CPU address space to PCI address space
*/
LOONGSON_ADDRWIN_CPUTOPCI(ADDRWIN_WIN2, LOONGSON_CPU_MEM_SRC,
LOONGSON_PCI_MEM_DST, MMAP_CPUTOPCI_SIZE);
#endif
}
extern int sbx00_acpi_init(void);
static int __init pcibios_init(void)
{
setup_pcimap();
loongson_pci_controller.io_map_base = mips_io_port_base;
loongson_pci_mem_resource.start = loongson_sysconf.pci_mem_start_addr;