Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) // Copyright (C) 2005-2017 Andes Technology Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <linux/highmem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/memblock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <asm/fixmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/tlbflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) void *kmap_atomic_high_prot(struct page *page, pgprot_t prot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	unsigned int idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	unsigned long vaddr, pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	int type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	pte_t *ptep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	type = kmap_atomic_idx_push();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	idx = type + KM_TYPE_NR * smp_processor_id();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	pte = (page_to_pfn(page) << PAGE_SHIFT) | prot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	ptep = pte_offset_kernel(pmd_off_k(vaddr), vaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	set_pte(ptep, pte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	__nds32__tlbop_inv(vaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	__nds32__mtsr_dsb(vaddr, NDS32_SR_TLB_VPN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	__nds32__tlbop_rwr(pte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	__nds32__isb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	return (void *)vaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) EXPORT_SYMBOL(kmap_atomic_high_prot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) void kunmap_atomic_high(void *kvaddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	if (kvaddr >= (void *)FIXADDR_START) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 		unsigned long vaddr = (unsigned long)kvaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 		pte_t *ptep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 		kmap_atomic_idx_pop();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		__nds32__tlbop_inv(vaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 		__nds32__isb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		ptep = pte_offset_kernel(pmd_off_k(vaddr), vaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		set_pte(ptep, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) EXPORT_SYMBOL(kunmap_atomic_high);