ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/arch/powerpc/mm/ioremap_32.c b/marvell/linux/arch/powerpc/mm/ioremap_32.c
new file mode 100644
index 0000000..f36121f
--- /dev/null
+++ b/marvell/linux/arch/powerpc/mm/ioremap_32.c
@@ -0,0 +1,92 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+#include <mm/mmu_decl.h>
+
+void __iomem *ioremap_wt(phys_addr_t addr, unsigned long size)
+{
+ pgprot_t prot = pgprot_cached_wthru(PAGE_KERNEL);
+
+ return __ioremap_caller(addr, size, prot, __builtin_return_address(0));
+}
+EXPORT_SYMBOL(ioremap_wt);
+
+void __iomem *
+__ioremap_caller(phys_addr_t addr, unsigned long size, pgprot_t prot, void *caller)
+{
+ unsigned long v;
+ phys_addr_t p, offset;
+ int err;
+
+ /*
+ * Choose an address to map it to.
+ * Once the vmalloc system is running, we use it.
+ * Before then, we use space going down from IOREMAP_TOP
+ * (ioremap_bot records where we're up to).
+ */
+ p = addr & PAGE_MASK;
+ offset = addr & ~PAGE_MASK;
+ size = PAGE_ALIGN(addr + size) - p;
+
+ /*
+ * If the address lies within the first 16 MB, assume it's in ISA
+ * memory space
+ */
+ if (p < 16 * 1024 * 1024)
+ p += _ISA_MEM_BASE;
+
+#ifndef CONFIG_CRASH_DUMP
+ /*
+ * Don't allow anybody to remap normal RAM that we're using.
+ * mem_init() sets high_memory so only do the check after that.
+ */
+ if (slab_is_available() && p <= virt_to_phys(high_memory - 1) &&
+ page_is_ram(__phys_to_pfn(p))) {
+ pr_warn("%s(): phys addr 0x%llx is RAM lr %ps\n", __func__,
+ (unsigned long long)p, __builtin_return_address(0));
+ return NULL;
+ }
+#endif
+
+ if (size == 0)
+ return NULL;
+
+ /*
+ * Is it already mapped? Perhaps overlapped by a previous
+ * mapping.
+ */
+ v = p_block_mapped(p);
+ if (v)
+ return (void __iomem *)v + offset;
+
+ if (slab_is_available())
+ return do_ioremap(p, offset, size, prot, caller);
+
+ /*
+ * Should check if it is a candidate for a BAT mapping
+ */
+
+ err = early_ioremap_range(ioremap_bot - size, p, size, prot);
+ if (err)
+ return NULL;
+ ioremap_bot -= size;
+
+ return (void __iomem *)ioremap_bot + offset;
+}
+
+void iounmap(volatile void __iomem *addr)
+{
+ /*
+ * If mapped by BATs then there is nothing to do.
+ * Calling vfree() generates a benign warning.
+ */
+ if (v_block_mapped((unsigned long)addr))
+ return;
+
+ if (addr > high_memory && (unsigned long)addr < ioremap_bot)
+ vunmap((void *)(PAGE_MASK & (unsigned long)addr));
+}
+EXPORT_SYMBOL(iounmap);