From 392e8802486cb573b916e746010e141a75f507e6 Mon Sep 17 00:00:00 2001
From: Kevin
Date: Sat, 15 Nov 2014 09:58:27 +0800
Subject: init android origin source code
---
ANDROID_3.4.5/arch/alpha/kernel/pci-noop.c | 189 +++++++++++++++++++++++++++++
1 file changed, 189 insertions(+)
create mode 100644 ANDROID_3.4.5/arch/alpha/kernel/pci-noop.c
(limited to 'ANDROID_3.4.5/arch/alpha/kernel/pci-noop.c')
diff --git a/ANDROID_3.4.5/arch/alpha/kernel/pci-noop.c b/ANDROID_3.4.5/arch/alpha/kernel/pci-noop.c
new file mode 100644
index 00000000..df24b76f
--- /dev/null
+++ b/ANDROID_3.4.5/arch/alpha/kernel/pci-noop.c
@@ -0,0 +1,189 @@
+/*
+ * linux/arch/alpha/kernel/pci-noop.c
+ *
+ * Stub PCI interfaces for Jensen-specific kernels.
+ */
+
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/gfp.h>
+#include <linux/capability.h>
+#include <linux/mm.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/dma-mapping.h>
+#include <linux/scatterlist.h>
+
+#include "proto.h"
+
+
+/*
+ * The PCI controller list.
+ */
+
+struct pci_controller *hose_head, **hose_tail = &hose_head;
+struct pci_controller *pci_isa_hose;
+
+
+struct pci_controller * __init
+alloc_pci_controller(void)
+{
+ struct pci_controller *hose;
+
+ hose = alloc_bootmem(sizeof(*hose));
+
+ *hose_tail = hose;
+ hose_tail = &hose->next;
+
+ return hose;
+}
+
+struct resource * __init
+alloc_resource(void)
+{
+ struct resource *res;
+
+ res = alloc_bootmem(sizeof(*res));
+
+ return res;
+}
+
+asmlinkage long
+sys_pciconfig_iobase(long which, unsigned long bus, unsigned long dfn)
+{
+ struct pci_controller *hose;
+
+ /* from hose or from bus.devfn */
+ if (which & IOBASE_FROM_HOSE) {
+ for (hose = hose_head; hose; hose = hose->next)
+ if (hose->index == bus)
+ break;
+ if (!hose)
+ return -ENODEV;
+ } else {
+ /* Special hook for ISA access. */
+ if (bus == 0 && dfn == 0)
+ hose = pci_isa_hose;
+ else
+ return -ENODEV;
+ }
+
+ switch (which & ~IOBASE_FROM_HOSE) {
+ case IOBASE_HOSE:
+ return hose->index;
+ case IOBASE_SPARSE_MEM:
+ return hose->sparse_mem_base;
+ case IOBASE_DENSE_MEM:
+ return hose->dense_mem_base;
+ case IOBASE_SPARSE_IO:
+ return hose->sparse_io_base;
+ case IOBASE_DENSE_IO:
+ return hose->dense_io_base;
+ case IOBASE_ROOT_BUS:
+ return hose->bus->number;
+ }
+
+ return -EOPNOTSUPP;
+}
+
+asmlinkage long
+sys_pciconfig_read(unsigned long bus, unsigned long dfn,
+ unsigned long off, unsigned long len, void *buf)
+{
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ else
+ return -ENODEV;
+}
+
+asmlinkage long
+sys_pciconfig_write(unsigned long bus, unsigned long dfn,
+ unsigned long off, unsigned long len, void *buf)
+{
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ else
+ return -ENODEV;
+}
+
+static void *alpha_noop_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp,
+ struct dma_attrs *attrs)
+{
+ void *ret;
+
+ if (!dev || *dev->dma_mask >= 0xffffffffUL)
+ gfp &= ~GFP_DMA;
+ ret = (void *)__get_free_pages(gfp, get_order(size));
+ if (ret) {
+ memset(ret, 0, size);
+ *dma_handle = virt_to_phys(ret);
+ }
+ return ret;
+}
+
+static void alpha_noop_free_coherent(struct device *dev, size_t size,
+ void *cpu_addr, dma_addr_t dma_addr,
+ struct dma_attrs *attrs)
+{
+ free_pages((unsigned long)cpu_addr, get_order(size));
+}
+
+static dma_addr_t alpha_noop_map_page(struct device *dev, struct page *page,
+ unsigned long offset, size_t size,
+ enum dma_data_direction dir,
+ struct dma_attrs *attrs)
+{
+ return page_to_pa(page) + offset;
+}
+
+static int alpha_noop_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
+ enum dma_data_direction dir, struct dma_attrs *attrs)
+{
+ int i;
+ struct scatterlist *sg;
+
+ for_each_sg(sgl, sg, nents, i) {
+ void *va;
+
+ BUG_ON(!sg_page(sg));
+ va = sg_virt(sg);
+ sg_dma_address(sg) = (dma_addr_t)virt_to_phys(va);
+ sg_dma_len(sg) = sg->length;
+ }
+
+ return nents;
+}
+
+static int alpha_noop_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+ return 0;
+}
+
+static int alpha_noop_supported(struct device *dev, u64 mask)
+{
+ return mask < 0x00ffffffUL ? 0 : 1;
+}
+
+static int alpha_noop_set_mask(struct device *dev, u64 mask)
+{
+ if (!dev->dma_mask || !dma_supported(dev, mask))
+ return -EIO;
+
+ *dev->dma_mask = mask;
+ return 0;
+}
+
+struct dma_map_ops alpha_noop_ops = {
+ .alloc = alpha_noop_alloc_coherent,
+ .free = alpha_noop_free_coherent,
+ .map_page = alpha_noop_map_page,
+ .map_sg = alpha_noop_map_sg,
+ .mapping_error = alpha_noop_mapping_error,
+ .dma_supported = alpha_noop_supported,
+ .set_dma_mask = alpha_noop_set_mask,
+};
+
+struct dma_map_ops *dma_ops = &alpha_noop_ops;
+EXPORT_SYMBOL(dma_ops);
--
cgit