MIPS: Loongson64: Drop setup_pcimap

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

arch/mips/loongson64/pci.c

@@ -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;