ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/arch/powerpc/mm/ioremap_64.c b/marvell/linux/arch/powerpc/mm/ioremap_64.c
new file mode 100644
index 0000000..fd29e51
--- /dev/null
+++ b/marvell/linux/arch/powerpc/mm/ioremap_64.c
@@ -0,0 +1,113 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+/**
+ * Low level function to establish the page tables for an IO mapping
+ */
+void __iomem *__ioremap_at(phys_addr_t pa, void *ea, unsigned long size, pgprot_t prot)
+{
+ int ret;
+ unsigned long va = (unsigned long)ea;
+
+ /* We don't support the 4K PFN hack with ioremap */
+ if (pgprot_val(prot) & H_PAGE_4K_PFN)
+ return NULL;
+
+ if ((ea + size) >= (void *)IOREMAP_END) {
+ pr_warn("Outside the supported range\n");
+ return NULL;
+ }
+
+ WARN_ON(pa & ~PAGE_MASK);
+ WARN_ON(((unsigned long)ea) & ~PAGE_MASK);
+ WARN_ON(size & ~PAGE_MASK);
+
+ if (slab_is_available()) {
+ ret = ioremap_page_range(va, va + size, pa, prot);
+ if (ret)
+ unmap_kernel_range(va, size);
+ } else {
+ ret = early_ioremap_range(va, pa, size, prot);
+ }
+
+ if (ret)
+ return NULL;
+
+ return (void __iomem *)ea;
+}
+EXPORT_SYMBOL(__ioremap_at);
+
+/**
+ * Low level function to tear down the page tables for an IO mapping. This is
+ * used for mappings that are manipulated manually, like partial unmapping of
+ * PCI IOs or ISA space.
+ */
+void __iounmap_at(void *ea, unsigned long size)
+{
+ WARN_ON(((unsigned long)ea) & ~PAGE_MASK);
+ WARN_ON(size & ~PAGE_MASK);
+
+ unmap_kernel_range((unsigned long)ea, size);
+}
+EXPORT_SYMBOL(__iounmap_at);
+
+void __iomem *__ioremap_caller(phys_addr_t addr, unsigned long size,
+ pgprot_t prot, void *caller)
+{
+ phys_addr_t paligned, offset;
+ void __iomem *ret;
+ int err;
+
+ /* We don't support the 4K PFN hack with ioremap */
+ if (pgprot_val(prot) & H_PAGE_4K_PFN)
+ return NULL;
+
+ /*
+ * Choose an address to map it to. Once the vmalloc system is running,
+ * we use it. Before that, we map using addresses going up from
+ * ioremap_bot. vmalloc will use the addresses from IOREMAP_BASE
+ * through ioremap_bot.
+ */
+ paligned = addr & PAGE_MASK;
+ offset = addr & ~PAGE_MASK;
+ size = PAGE_ALIGN(addr + size) - paligned;
+
+ if (size == 0 || paligned == 0)
+ return NULL;
+
+ if (slab_is_available())
+ return do_ioremap(paligned, offset, size, prot, caller);
+
+ err = early_ioremap_range(ioremap_bot, paligned, size, prot);
+ if (err)
+ return NULL;
+
+ ret = (void __iomem *)ioremap_bot + offset;
+ ioremap_bot += size;
+
+ return ret;
+}
+
+/*
+ * Unmap an IO region and remove it from vmalloc'd list.
+ * Access to IO memory should be serialized by driver.
+ */
+void iounmap(volatile void __iomem *token)
+{
+ void *addr;
+
+ if (!slab_is_available())
+ return;
+
+ addr = (void *)((unsigned long __force)PCI_FIX_ADDR(token) & PAGE_MASK);
+
+ if ((unsigned long)addr < ioremap_bot) {
+ pr_warn("Attempt to iounmap early bolted mapping at 0x%p\n", addr);
+ return;
+ }
+ vunmap(addr);
+}
+EXPORT_SYMBOL(iounmap);