1 files changed, 205 insertions, 0 deletions

diff --git a/arch/powerpc/sysdev/cpm_common.c b/arch/powerpc/sysdev/cpm_common.c
new file mode 100644
index 000000000000..66c8ad4cfce6
--- /dev/null
+++ b/arch/powerpc/sysdev/cpm_common.c
@@ -0,0 +1,205 @@
+/*
+ * Common CPM code
+ *
+ * Author: Scott Wood <scottwood@freescale.com>
+ *
+ * Copyright 2007 Freescale Semiconductor, Inc.
+ *
+ * Some parts derived from commproc.c/cpm2_common.c, which is:
+ * Copyright (c) 1997 Dan error_act (dmalek@jlc.net)
+ * Copyright (c) 1999-2001 Dan Malek <dan@embeddedalley.com>
+ * Copyright (c) 2000 MontaVista Software, Inc (source@mvista.com)
+ * 2006 (c) MontaVista Software, Inc.
+ * Vitaly Bordug <vbordug@ru.mvista.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/of_device.h>
+
+#include <asm/udbg.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/rheap.h>
+#include <asm/cpm.h>
+
+#include <mm/mmu_decl.h>
+
+#ifdef CONFIG_PPC_EARLY_DEBUG_CPM
+static u32 __iomem *cpm_udbg_txdesc =
+        (u32 __iomem __force *)CONFIG_PPC_EARLY_DEBUG_CPM_ADDR;
+
+static void udbg_putc_cpm(char c)
+{
+        u8 __iomem *txbuf = (u8 __iomem __force *)in_be32(&cpm_udbg_txdesc[1]);
+
+        if (c == '\n')
+                udbg_putc('\r');
+
+        while (in_be32(&cpm_udbg_txdesc[0]) & 0x80000000)
+                ;
+
+        out_8(txbuf, c);
+        out_be32(&cpm_udbg_txdesc[0], 0xa0000001);
+}
+
+void __init udbg_init_cpm(void)
+{
+        if (cpm_udbg_txdesc) {
+#ifdef CONFIG_CPM2
+                setbat(1, 0xf0000000, 0xf0000000, 1024*1024, _PAGE_IO);
+#endif
+                udbg_putc = udbg_putc_cpm;
+                udbg_putc('X');
+        }
+}
+#endif
+
+#ifdef CONFIG_PPC_CPM_NEW_BINDING
+static spinlock_t cpm_muram_lock;
+static rh_block_t cpm_boot_muram_rh_block[16];
+static rh_info_t cpm_muram_info;
+static u8 __iomem *muram_vbase;
+static phys_addr_t muram_pbase;
+
+/* Max address size we deal with */
+#define OF_MAX_ADDR_CELLS       4
+
+int __init cpm_muram_init(void)
+{
+        struct device_node *np;
+        struct resource r;
+        u32 zero[OF_MAX_ADDR_CELLS] = {};
+        resource_size_t max = 0;
+        int i = 0;
+        int ret = 0;
+
+        printk("cpm_muram_init\n");
+
+        spin_lock_init(&cpm_muram_lock);
+        /* initialize the info header */
+        rh_init(&cpm_muram_info, 1,
+                sizeof(cpm_boot_muram_rh_block) /
+                sizeof(cpm_boot_muram_rh_block[0]),
+                cpm_boot_muram_rh_block);
+
+        np = of_find_compatible_node(NULL, NULL, "fsl,cpm-muram-data");
+        if (!np) {
+                printk(KERN_ERR "Cannot find CPM muram data node");
+                ret = -ENODEV;
+                goto out;
+        }
+
+        muram_pbase = of_translate_address(np, zero);
+        if (muram_pbase == (phys_addr_t)OF_BAD_ADDR) {
+                printk(KERN_ERR "Cannot translate zero through CPM muram node");
+                ret = -ENODEV;
+                goto out;
+        }
+
+        while (of_address_to_resource(np, i++, &r) == 0) {
+                if (r.end > max)
+                        max = r.end;
+
+                rh_attach_region(&cpm_muram_info, r.start - muram_pbase,
+                                 r.end - r.start + 1);
+        }
+
+        muram_vbase = ioremap(muram_pbase, max - muram_pbase + 1);
+        if (!muram_vbase) {
+                printk(KERN_ERR "Cannot map CPM muram");
+                ret = -ENOMEM;
+        }
+
+out:
+        of_node_put(np);
+        return ret;
+}
+
+/**
+ * cpm_muram_alloc - allocate the requested size worth of multi-user ram
+ * @size: number of bytes to allocate
+ * @align: requested alignment, in bytes
+ *
+ * This function returns an offset into the muram area.
+ * Use cpm_dpram_addr() to get the virtual address of the area.
+ * Use cpm_muram_free() to free the allocation.
+ */
+unsigned long cpm_muram_alloc(unsigned long size, unsigned long align)
+{
+        unsigned long start;
+        unsigned long flags;
+
+        spin_lock_irqsave(&cpm_muram_lock, flags);
+        cpm_muram_info.alignment = align;
+        start = rh_alloc(&cpm_muram_info, size, "commproc");
+        spin_unlock_irqrestore(&cpm_muram_lock, flags);
+
+        return start;
+}
+EXPORT_SYMBOL(cpm_muram_alloc);
+
+/**
+ * cpm_muram_free - free a chunk of multi-user ram
+ * @offset: The beginning of the chunk as returned by cpm_muram_alloc().
+ */
+int cpm_muram_free(unsigned long offset)
+{
+        int ret;
+        unsigned long flags;
+
+        spin_lock_irqsave(&cpm_muram_lock, flags);
+        ret = rh_free(&cpm_muram_info, offset);
+        spin_unlock_irqrestore(&cpm_muram_lock, flags);
+
+        return ret;
+}
+EXPORT_SYMBOL(cpm_muram_free);
+
+/**
+ * cpm_muram_alloc_fixed - reserve a specific region of multi-user ram
+ * @offset: the offset into the muram area to reserve
+ * @size: the number of bytes to reserve
+ *
+ * This function returns "start" on success, -ENOMEM on failure.
+ * Use cpm_dpram_addr() to get the virtual address of the area.
+ * Use cpm_muram_free() to free the allocation.
+ */
+unsigned long cpm_muram_alloc_fixed(unsigned long offset, unsigned long size)
+{
+        unsigned long start;
+        unsigned long flags;
+
+        spin_lock_irqsave(&cpm_muram_lock, flags);
+        cpm_muram_info.alignment = 1;
+        start = rh_alloc_fixed(&cpm_muram_info, offset, size, "commproc");
+        spin_unlock_irqrestore(&cpm_muram_lock, flags);
+
+        return start;
+}
+EXPORT_SYMBOL(cpm_muram_alloc_fixed);
+
+/**
+ * cpm_muram_addr - turn a muram offset into a virtual address
+ * @offset: muram offset to convert
+ */
+void __iomem *cpm_muram_addr(unsigned long offset)
+{
+        return muram_vbase + offset;
+}
+EXPORT_SYMBOL(cpm_muram_addr);
+
+/**
+ * cpm_muram_phys - turn a muram virtual address into a DMA address
+ * @offset: virtual address from cpm_muram_addr() to convert
+ */
+dma_addr_t cpm_muram_dma(void __iomem *addr)
+{
+        return muram_pbase + ((u8 __iomem *)addr - muram_vbase);
+}
+EXPORT_SYMBOL(cpm_muram_dma);
+
+#endif /* CONFIG_PPC_CPM_NEW_BINDING */