change wifi driver to cypress

hc

2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390

 kernel/arch/xtensa/mm/highmem.c
..
..
@@ -12,6 +12,8 @@
12
12
 #include <linux/highmem.h>
13
13
 #include <asm/tlbflush.h>
14
14
 
15
+static pte_t *kmap_pte;
16
+
15
17
 #if DCACHE_WAY_SIZE > PAGE_SIZE
16
18
 unsigned int last_pkmap_nr_arr[DCACHE_N_COLORS];
17
19
 wait_queue_head_t pkmap_map_wait_arr[DCACHE_N_COLORS];
..
..
@@ -31,25 +33,59 @@
31
33
 
32
34
 static inline enum fixed_addresses kmap_idx(int type, unsigned long color)
33
35
 {
34
-	return (type + KM_MAX_IDX * smp_processor_id()) * DCACHE_N_COLORS +
36
+	return (type + KM_TYPE_NR * smp_processor_id()) * DCACHE_N_COLORS +
35
37
 		color;
36
38
 }
37
39
 
38
-enum fixed_addresses kmap_local_map_idx(int type, unsigned long pfn)
40
+void *kmap_atomic_high_prot(struct page *page, pgprot_t prot)
39
41
 {
40
-	return kmap_idx(type, DCACHE_ALIAS(pfn << PAGE_SHIFT));
41
-}
42
+	enum fixed_addresses idx;
43
+	unsigned long vaddr;
42
44
 
43
-enum fixed_addresses kmap_local_unmap_idx(int type, unsigned long addr)
44
-{
45
-	return kmap_idx(type, DCACHE_ALIAS(addr));
45
+	idx = kmap_idx(kmap_atomic_idx_push(),
46
+		       DCACHE_ALIAS(page_to_phys(page)));
47
+	vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
48
+#ifdef CONFIG_DEBUG_HIGHMEM
49
+	BUG_ON(!pte_none(*(kmap_pte + idx)));
50
+#endif
51
+	set_pte(kmap_pte + idx, mk_pte(page, prot));
52
+
53
+	return (void *)vaddr;
46
54
 }
55
+EXPORT_SYMBOL(kmap_atomic_high_prot);
56
+
57
+void kunmap_atomic_high(void *kvaddr)
58
+{
59
+	if (kvaddr >= (void *)FIXADDR_START &&
60
+	    kvaddr < (void *)FIXADDR_TOP) {
61
+		int idx = kmap_idx(kmap_atomic_idx(),
62
+				   DCACHE_ALIAS((unsigned long)kvaddr));
63
+
64
+		/*
65
+		 * Force other mappings to Oops if they'll try to access this
66
+		 * pte without first remap it.  Keeping stale mappings around
67
+		 * is a bad idea also, in case the page changes cacheability
68
+		 * attributes or becomes a protected page in a hypervisor.
69
+		 */
70
+		pte_clear(&init_mm, kvaddr, kmap_pte + idx);
71
+		local_flush_tlb_kernel_range((unsigned long)kvaddr,
72
+					     (unsigned long)kvaddr + PAGE_SIZE);
73
+
74
+		kmap_atomic_idx_pop();
75
+	}
76
+}
77
+EXPORT_SYMBOL(kunmap_atomic_high);
47
78
 
48
79
 void __init kmap_init(void)
49
80
 {
81
+	unsigned long kmap_vstart;
82
+
50
83
 	/* Check if this memory layout is broken because PKMAP overlaps
51
84
 	 * page table.
52
85
 	 */
53
86
 	BUILD_BUG_ON(PKMAP_BASE < TLBTEMP_BASE_1 + TLBTEMP_SIZE);
87
+	/* cache the first kmap pte */
88
+	kmap_vstart = __fix_to_virt(FIX_KMAP_BEGIN);
89
+	kmap_pte = virt_to_kpte(kmap_vstart);
54
90
 	kmap_waitqueues_init();
55
91
 }