SPDX: Convert all of our single license tags to Linux Kernel style

[oweals/u-boot.git] / arch / arm / mach-mvebu / arm64-common.c

diff --git a/arch/arm/mach-mvebu/arm64-common.c b/arch/arm/mach-mvebu/arm64-common.c
index 7055a81de32279cb7a18b8ec541e6e6629e11ae1..d3ea9e67e07fe35c73ada2532281f1be642c5590 100644 (file)
--- a/arch/arm/mach-mvebu/arm64-common.c
+++ b/arch/arm/mach-mvebu/arm64-common.c
@@ -1,13 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2016 Stefan Roese <sr@denx.de>
- *
- * SPDX-License-Identifier:    GPL-2.0+
  */
 
 #include <common.h>
 #include <dm.h>
 #include <fdtdec.h>
-#include <libfdt.h>
+#include <linux/libfdt.h>
+#include <pci.h>
 #include <asm/io.h>
 #include <asm/system.h>
 #include <asm/arch/cpu.h>
@@ -16,6 +16,23 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+/*
+ * Not all memory is mapped in the MMU. So we need to restrict the
+ * memory size so that U-Boot does not try to access it. Also, the
+ * internal registers are located at 0xf000.0000 - 0xffff.ffff.
+ * Currently only 2GiB are mapped for system memory. This is what
+ * we pass to the U-Boot subsystem here.
+ */
+#define USABLE_RAM_SIZE                0x80000000
+
+ulong board_get_usable_ram_top(ulong total_size)
+{
+       if (gd->ram_size > USABLE_RAM_SIZE)
+               return USABLE_RAM_SIZE;
+
+       return gd->ram_size;
+}
+
 /*
  * On ARMv8, MBus is not configured in U-Boot. To enable compilation
  * of the already implemented drivers, lets add a dummy version of
@@ -28,77 +45,21 @@ const struct mbus_dram_target_info *mvebu_mbus_dram_info(void)
 
 /* DRAM init code ... */
 
-static const void *get_memory_reg_prop(const void *fdt, int *lenp)
+int dram_init_banksize(void)
 {
-       int offset;
+       fdtdec_setup_memory_banksize();
 
-       offset = fdt_path_offset(fdt, "/memory");
-       if (offset < 0)
-               return NULL;
-
-       return fdt_getprop(fdt, offset, "reg", lenp);
+       return 0;
 }
 
 int dram_init(void)
 {
-       const void *fdt = gd->fdt_blob;
-       const fdt32_t *val;
-       int ac, sc, len;
-
-       ac = fdt_address_cells(fdt, 0);
-       sc = fdt_size_cells(fdt, 0);
-       if (ac < 0 || sc < 1 || sc > 2) {
-               printf("invalid address/size cells\n");
-               return -EINVAL;
-       }
-
-       val = get_memory_reg_prop(fdt, &len);
-       if (len / sizeof(*val) < ac + sc)
+       if (fdtdec_setup_memory_size() != 0)
                return -EINVAL;
 
-       val += ac;
-
-       gd->ram_size = fdtdec_get_number(val, sc);
-
-       debug("DRAM size = %08lx\n", (unsigned long)gd->ram_size);
-
        return 0;
 }
 
-void dram_init_banksize(void)
-{
-       const void *fdt = gd->fdt_blob;
-       const fdt32_t *val;
-       int ac, sc, cells, len, i;
-
-       val = get_memory_reg_prop(fdt, &len);
-       if (len < 0)
-               return;
-
-       ac = fdt_address_cells(fdt, 0);
-       sc = fdt_size_cells(fdt, 0);
-       if (ac < 1 || sc > 2 || sc < 1 || sc > 2) {
-               printf("invalid address/size cells\n");
-               return;
-       }
-
-       cells = ac + sc;
-
-       len /= sizeof(*val);
-
-       for (i = 0; i < CONFIG_NR_DRAM_BANKS && len >= cells;
-            i++, len -= cells) {
-               gd->bd->bi_dram[i].start = fdtdec_get_number(val, ac);
-               val += ac;
-               gd->bd->bi_dram[i].size = fdtdec_get_number(val, sc);
-               val += sc;
-
-               debug("DRAM bank %d: start = %08lx, size = %08lx\n",
-                     i, (unsigned long)gd->bd->bi_dram[i].start,
-                     (unsigned long)gd->bd->bi_dram[i].size);
-       }
-}
-
 int arch_cpu_init(void)
 {
        /* Nothing to do (yet) */
@@ -109,16 +70,29 @@ int arch_early_init_r(void)
 {
        struct udevice *dev;
        int ret;
-
-       /* Call the comphy code via the MISC uclass driver */
-       ret = uclass_get_device(UCLASS_MISC, 0, &dev);
-       if (ret) {
-               debug("COMPHY init failed: %d\n", ret);
-               return -ENODEV;
+       int i;
+
+       /*
+        * Loop over all MISC uclass drivers to call the comphy code
+        * and init all CP110 devices enabled in the DT
+        */
+       i = 0;
+       while (1) {
+               /* Call the comphy code via the MISC uclass driver */
+               ret = uclass_get_device(UCLASS_MISC, i++, &dev);
+
+               /* We're done, once no further CP110 device is found */
+               if (ret)
+                       break;
        }
 
        /* Cause the SATA device to do its early init */
        uclass_first_device(UCLASS_AHCI, &dev);
 
+#ifdef CONFIG_DM_PCI
+       /* Trigger PCIe devices detection */
+       pci_init();
+#endif
+
        return 0;
 }