change otg to host mode

hc

2024-05-11 04dd17822334871b23ea2862f7798fb0e0007777

 kernel/arch/arm/mm/ioremap.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  *  linux/arch/arm/mm/ioremap.c
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  *
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@@ -26,6 +27,7 @@
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 #include <linux/vmalloc.h>
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 #include <linux/io.h>
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 #include <linux/sizes.h>
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+#include <linux/memblock.h>
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 #include <asm/cp15.h>
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 #include <asm/cputype.h>
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@@ -140,14 +142,8 @@
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 static void unmap_area_sections(unsigned long virt, unsigned long size)
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 {
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 	unsigned long addr = virt, end = virt + (size & ~(SZ_1M - 1));
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-	pgd_t *pgd;
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-	pud_t *pud;
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-	pmd_t *pmdp;
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+	pmd_t *pmdp = pmd_off_k(addr);
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-	flush_cache_vunmap(addr, end);
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-	pgd = pgd_offset_k(addr);
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-	pud = pud_offset(pgd, addr);
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-	pmdp = pmd_offset(pud, addr);
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 	do {
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 		pmd_t pmd = *pmdp;
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@@ -188,9 +184,7 @@
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 		    size_t size, const struct mem_type *type)
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 {
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 	unsigned long addr = virt, end = virt + size;
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-	pgd_t *pgd;
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-	pud_t *pud;
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-	pmd_t *pmd;
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+	pmd_t *pmd = pmd_off_k(addr);
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 	/*
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 	 * Remove and free any PTE-based mapping, and
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@@ -198,9 +192,6 @@
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 	 */
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 	unmap_area_sections(virt, size);
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-	pgd = pgd_offset_k(addr);
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-	pud = pud_offset(pgd, addr);
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-	pmd = pmd_offset(pud, addr);
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 	do {
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 		pmd[0] = __pmd(__pfn_to_phys(pfn) | type->prot_sect);
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 		pfn += SZ_1M >> PAGE_SHIFT;
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@@ -220,19 +211,13 @@
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 			 size_t size, const struct mem_type *type)
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 {
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 	unsigned long addr = virt, end = virt + size;
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-	pgd_t *pgd;
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-	pud_t *pud;
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-	pmd_t *pmd;
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+	pmd_t *pmd = pmd_off_k(addr);
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 	/*
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 	 * Remove and free any PTE-based mapping, and
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 	 * sync the current kernel mapping.
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 	 */
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 	unmap_area_sections(virt, size);
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-
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-	pgd = pgd_offset_k(virt);
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-	pud = pud_offset(pgd, addr);
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-	pmd = pmd_offset(pud, addr);
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 	do {
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 		unsigned long super_pmd_val, i;
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@@ -300,7 +285,8 @@
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 	 * Don't allow RAM to be mapped with mismatched attributes - this
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 	 * causes problems with ARMv6+
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 	 */
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-	if (WARN_ON(pfn_valid(pfn) && mtype != MT_MEMORY_RW))
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+	if (WARN_ON(memblock_is_map_memory(PFN_PHYS(pfn)) &&
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+		    mtype != MT_MEMORY_RW))
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 		return NULL;
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 	area = get_vm_area_caller(size, VM_IOREMAP, caller);
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@@ -381,15 +367,11 @@
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 EXPORT_SYMBOL(ioremap);
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 void __iomem *ioremap_cache(resource_size_t res_cookie, size_t size)
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-	__alias(ioremap_cached);
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-
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-void __iomem *ioremap_cached(resource_size_t res_cookie, size_t size)
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 {
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 	return arch_ioremap_caller(res_cookie, size, MT_DEVICE_CACHED,
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 				   __builtin_return_address(0));
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 }
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 EXPORT_SYMBOL(ioremap_cache);
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-EXPORT_SYMBOL(ioremap_cached);
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 void __iomem *ioremap_wc(resource_size_t res_cookie, size_t size)
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 {
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@@ -497,3 +479,11 @@
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 {
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 	early_ioremap_setup();
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 }
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+
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+bool arch_memremap_can_ram_remap(resource_size_t offset, size_t size,
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+				 unsigned long flags)
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+{
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+	unsigned long pfn = PHYS_PFN(offset);
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+
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+	return memblock_is_map_memory(pfn);
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+}