[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/arch/sparc/prom/ranges.c b/src/kernel/linux/v4.14/arch/sparc/prom/ranges.c
new file mode 100644
index 0000000..20cb828
--- /dev/null
+++ b/src/kernel/linux/v4.14/arch/sparc/prom/ranges.c
@@ -0,0 +1,114 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ranges.c: Handle ranges in newer proms for obio/sbus.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include <asm/openprom.h>
+#include <asm/oplib.h>
+#include <asm/types.h>
+
+static struct linux_prom_ranges promlib_obio_ranges[PROMREG_MAX];
+static int num_obio_ranges;
+
+/* Adjust register values based upon the ranges parameters. */
+static void prom_adjust_regs(struct linux_prom_registers *regp, int nregs,
+ struct linux_prom_ranges *rangep, int nranges)
+{
+ int regc, rngc;
+
+ for (regc = 0; regc < nregs; regc++) {
+ for (rngc = 0; rngc < nranges; rngc++)
+ if (regp[regc].which_io == rangep[rngc].ot_child_space)
+ break; /* Fount it */
+ if (rngc == nranges) /* oops */
+ prom_printf("adjust_regs: Could not find range with matching bus type...\n");
+ regp[regc].which_io = rangep[rngc].ot_parent_space;
+ regp[regc].phys_addr -= rangep[rngc].ot_child_base;
+ regp[regc].phys_addr += rangep[rngc].ot_parent_base;
+ }
+}
+
+static void prom_adjust_ranges(struct linux_prom_ranges *ranges1, int nranges1,
+ struct linux_prom_ranges *ranges2, int nranges2)
+{
+ int rng1c, rng2c;
+
+ for (rng1c = 0; rng1c < nranges1; rng1c++) {
+ for (rng2c = 0; rng2c < nranges2; rng2c++)
+ if (ranges1[rng1c].ot_parent_space == ranges2[rng2c].ot_child_space &&
+ ranges1[rng1c].ot_parent_base >= ranges2[rng2c].ot_child_base &&
+ ranges2[rng2c].ot_child_base + ranges2[rng2c].or_size - ranges1[rng1c].ot_parent_base > 0U)
+ break;
+ if (rng2c == nranges2) /* oops */
+ prom_printf("adjust_ranges: Could not find matching bus type...\n");
+ else if (ranges1[rng1c].ot_parent_base + ranges1[rng1c].or_size > ranges2[rng2c].ot_child_base + ranges2[rng2c].or_size)
+ ranges1[rng1c].or_size = ranges2[rng2c].ot_child_base + ranges2[rng2c].or_size - ranges1[rng1c].ot_parent_base;
+ ranges1[rng1c].ot_parent_space = ranges2[rng2c].ot_parent_space;
+ ranges1[rng1c].ot_parent_base += ranges2[rng2c].ot_parent_base;
+ }
+}
+
+/* Apply probed obio ranges to registers passed, if no ranges return. */
+void prom_apply_obio_ranges(struct linux_prom_registers *regs, int nregs)
+{
+ if (num_obio_ranges)
+ prom_adjust_regs(regs, nregs, promlib_obio_ranges, num_obio_ranges);
+}
+EXPORT_SYMBOL(prom_apply_obio_ranges);
+
+void __init prom_ranges_init(void)
+{
+ phandle node, obio_node;
+ int success;
+
+ num_obio_ranges = 0;
+
+ /* Check for obio and sbus ranges. */
+ node = prom_getchild(prom_root_node);
+ obio_node = prom_searchsiblings(node, "obio");
+
+ if (obio_node) {
+ success = prom_getproperty(obio_node, "ranges",
+ (char *) promlib_obio_ranges,
+ sizeof(promlib_obio_ranges));
+ if (success != -1)
+ num_obio_ranges = (success / sizeof(struct linux_prom_ranges));
+ }
+
+ if (num_obio_ranges)
+ prom_printf("PROMLIB: obio_ranges %d\n", num_obio_ranges);
+}
+
+void prom_apply_generic_ranges(phandle node, phandle parent,
+ struct linux_prom_registers *regs, int nregs)
+{
+ int success;
+ int num_ranges;
+ struct linux_prom_ranges ranges[PROMREG_MAX];
+
+ success = prom_getproperty(node, "ranges",
+ (char *) ranges,
+ sizeof(ranges));
+ if (success != -1) {
+ num_ranges = (success / sizeof(struct linux_prom_ranges));
+ if (parent) {
+ struct linux_prom_ranges parent_ranges[PROMREG_MAX];
+ int num_parent_ranges;
+
+ success = prom_getproperty(parent, "ranges",
+ (char *) parent_ranges,
+ sizeof(parent_ranges));
+ if (success != -1) {
+ num_parent_ranges = (success / sizeof(struct linux_prom_ranges));
+ prom_adjust_ranges(ranges, num_ranges, parent_ranges, num_parent_ranges);
+ }
+ }
+ prom_adjust_regs(regs, nregs, ranges, num_ranges);
+ }
+}