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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/mips/mm/physaddr.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/mips/mm/physaddr.c')
-rw-r--r--arch/mips/mm/physaddr.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/mips/mm/physaddr.c b/arch/mips/mm/physaddr.c
new file mode 100644
index 0000000000..f9b8c85e98
--- /dev/null
+++ b/arch/mips/mm/physaddr.c
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/bug.h>
+#include <linux/export.h>
+#include <linux/types.h>
+#include <linux/mmdebug.h>
+#include <linux/mm.h>
+
+#include <asm/addrspace.h>
+#include <asm/sections.h>
+#include <asm/io.h>
+#include <asm/page.h>
+#include <asm/dma.h>
+
+static inline bool __debug_virt_addr_valid(unsigned long x)
+{
+ /*
+ * MAX_DMA_ADDRESS is a virtual address that may not correspond to an
+ * actual physical address. Enough code relies on
+ * virt_to_phys(MAX_DMA_ADDRESS) that we just need to work around it
+ * and always return true.
+ */
+ if (x == MAX_DMA_ADDRESS)
+ return true;
+
+ return x >= PAGE_OFFSET && (KSEGX(x) < KSEG2 ||
+ IS_ENABLED(CONFIG_EVA) ||
+ !IS_ENABLED(CONFIG_HIGHMEM));
+}
+
+phys_addr_t __virt_to_phys(volatile const void *x)
+{
+ WARN(!__debug_virt_addr_valid((unsigned long)x),
+ "virt_to_phys used for non-linear address: %pK (%pS)\n",
+ x, x);
+
+ return __virt_to_phys_nodebug(x);
+}
+EXPORT_SYMBOL(__virt_to_phys);
+
+phys_addr_t __phys_addr_symbol(unsigned long x)
+{
+ /* This is bounds checking against the kernel image only.
+ * __pa_symbol should only be used on kernel symbol addresses.
+ */
+ VIRTUAL_BUG_ON(x < (unsigned long)_text ||
+ x > (unsigned long)_end);
+
+ return __pa_symbol_nodebug(x);
+}
+EXPORT_SYMBOL(__phys_addr_symbol);