Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * I/O remap functions for Hexagon
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) void __iomem *ioremap(unsigned long phys_addr, unsigned long size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	unsigned long last_addr, addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	unsigned long offset = phys_addr & ~PAGE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	struct vm_struct *area;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	pgprot_t prot = __pgprot(_PAGE_PRESENT|_PAGE_READ|_PAGE_WRITE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 					|(__HEXAGON_C_DEV << 6));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	last_addr = phys_addr + size - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	/*  Wrapping not allowed  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	if (!size || (last_addr < phys_addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	/*  Rounds up to next page size, including whole-page offset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	size = PAGE_ALIGN(offset + size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	area = get_vm_area(size, VM_IOREMAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	addr = (unsigned long)area->addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	if (ioremap_page_range(addr, addr+size, phys_addr, prot)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 		vunmap((void *)addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	return (void __iomem *) (offset + addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) void iounmap(const volatile void __iomem *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	vunmap((void *) ((unsigned long) addr & PAGE_MASK));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }