dm: sandbox: pci: Add PCI support for sandbox

[karo-tx-uboot.git] / arch / sandbox / cpu / cpu.c

diff --git a/arch/sandbox/cpu/cpu.c b/arch/sandbox/cpu/cpu.c
index 1aa397c5e773d8403293786838df63c7b539fa94..007ae860346fa32dc88b445c78c8fd4b7a6919e1 100644 (file)
--- a/arch/sandbox/cpu/cpu.c
+++ b/arch/sandbox/cpu/cpu.c
@@ -2,7 +2,7 @@
  * Copyright (c) 2011 The Chromium OS Authors.
  * SPDX-License-Identifier:    GPL-2.0+
  */
-
+#define DEBUG
 #include <common.h>
 #include <dm/root.h>
 #include <os.h>
@@ -10,6 +10,15 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+/* Enable access to PCI memory with map_sysmem() */
+static bool enable_pci_map;
+
+#ifdef CONFIG_PCI
+/* Last device that was mapped into memory, and length of mapping */
+static struct udevice *map_dev;
+unsigned long map_len;
+#endif
+
 void reset_cpu(ulong ignored)
 {
        if (state_uninit())
@@ -59,9 +68,39 @@ int cleanup_before_linux(void)
 
 void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
 {
+#ifdef CONFIG_PCI
+       unsigned long plen = len;
+       void *ptr;
+
+       map_dev = NULL;
+       if (enable_pci_map && !pci_map_physmem(paddr, &len, &map_dev, &ptr)) {
+               if (plen != len) {
+                       printf("%s: Warning: partial map at %x, wanted %lx, got %lx\n",
+                              __func__, paddr, len, plen);
+               }
+               map_len = len;
+               return ptr;
+       }
+#endif
+
        return (void *)(gd->arch.ram_buf + paddr);
 }
 
+void unmap_physmem(const void *vaddr, unsigned long flags)
+{
+#ifdef CONFIG_PCI
+       if (map_dev) {
+               pci_unmap_physmem(vaddr, map_len, map_dev);
+               map_dev = NULL;
+       }
+#endif
+}
+
+void sandbox_set_enable_pci_map(int enable)
+{
+       enable_pci_map = enable;
+}
+
 phys_addr_t map_to_sysmem(const void *ptr)
 {
        return (u8 *)ptr - gd->arch.ram_buf;