arm/mm/iomap.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  *  linux/arch/arm/mm/iomap.c
0004  *
0005  * Map IO port and PCI memory spaces so that {read,write}[bwl] can
0006  * be used to access this memory.
0007  */
0008 #include <linux/module.h>
0009 #include <linux/pci.h>
0010 #include <linux/ioport.h>
0011 #include <linux/io.h>
0012
0013 #include <asm/vga.h>
0014
0015 unsigned long vga_base;
0016 EXPORT_SYMBOL(vga_base);
0017
0018 #ifdef __io
0019 void __iomem *ioport_map(unsigned long port, unsigned int nr)
0020 {
0021     return __io(port);
0022 }
0023 EXPORT_SYMBOL(ioport_map);
0024
0025 void ioport_unmap(void __iomem *addr)
0026 {
0027 }
0028 EXPORT_SYMBOL(ioport_unmap);
0029 #endif
0030
0031 #ifdef CONFIG_PCI
0032 unsigned long pcibios_min_io = 0x1000;
0033 EXPORT_SYMBOL(pcibios_min_io);
0034
0035 unsigned long pcibios_min_mem = 0x01000000;
0036 EXPORT_SYMBOL(pcibios_min_mem);
0037
0038 void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
0039 {
0040     if ((unsigned long)addr >= VMALLOC_START &&
0041         (unsigned long)addr < VMALLOC_END)
0042         iounmap(addr);
0043 }
0044 EXPORT_SYMBOL(pci_iounmap);
0045 #endif