Add a simple structure and search function to the common code that
can be used for looking up a set of addresses by type. The user
must supply the iomaps[] table, e.g.
struct iomap iomaps[] = {
{
.type = "virtio_mmio",
.nr = 4,
.addrs = { 0x2000000, 0x2000200, 0x2000400, 0x2000600, },
},
{
.type = NULL,
},
};
Also add a script scripts/gen-devtree-iomaps.pl that can generate
the iomaps table from an fdt, e.g.
fdtdump dtb | scripts/gen-devtree-iomaps.pl - virtio_mmio
Signed-off-by: Andrew Jones <drjones@xxxxxxxxxx>
---
README | 1 +
lib/iomaps.c | 12 +++++++
lib/iomaps.h | 12 +++++++
scripts/gen-devtree-iomaps.pl | 81 +++++++++++++++++++++++++++++++++++++++++++
4 files changed, 106 insertions(+)
create mode 100644 lib/iomaps.c
create mode 100644 lib/iomaps.h
create mode 100755 scripts/gen-devtree-iomaps.pl
diff --git a/README b/README
index 49468b94bc7fc..1e58fd2e3ca00 100644
--- a/README
+++ b/README
@@ -20,6 +20,7 @@ Directory structure:
.: Makefile and config files for the tests
./config: config files for the tests
./docs: documentation files
+./scripts: misc helper scripts
./lib: general services for the tests
./lib/<ARCH>: architecture dependent services for the tests
./<ARCH>: the sources of the tests and the created objects/images
diff --git a/lib/iomaps.c b/lib/iomaps.c
new file mode 100644
index 0000000000000..6169bcf2e43d2
--- /dev/null
+++ b/lib/iomaps.c
@@ -0,0 +1,12 @@
+#include "libcflat.h"
+#include "iomaps.h"
+
+extern struct iomap iomaps[];
+
+struct iomap *iomaps_find(const char *type)
+{
+ struct iomap *m = &iomaps[0];
+ for (; m->type && strcmp(m->type, type); ++m)
+ ;
+ return m->type ? m : NULL;
+}
diff --git a/lib/iomaps.h b/lib/iomaps.h
new file mode 100644
index 0000000000000..4581eee0e5337
--- /dev/null
+++ b/lib/iomaps.h
@@ -0,0 +1,12 @@
+#ifndef _IOMAPS_H_
+#define _IOMAPS_H_
+#include "libcflat.h"
+
+struct iomap {
+ const char *type;
+ u32 nr;
+ u32 addrs[64];
+};
+
+struct iomap *iomaps_find(const char *type);
+#endif
diff --git a/scripts/gen-devtree-iomaps.pl b/scripts/gen-devtree-iomaps.pl
new file mode 100755
index 0000000000000..91fa83d521839
--- /dev/null
+++ b/scripts/gen-devtree-iomaps.pl
@@ -0,0 +1,81 @@
+#!/usr/bin/perl -w
+use strict;
+
+my $fdt = shift @ARGV;
+my @types = @ARGV;
+my $max_nr = 64;
+
+if (!defined $fdt || $#types < 0) {
+ print STDERR "Usage: gen-devtree-iomaps ".
+ "<fdt-file|-> <addr-type> [addr-types...]\n";
+ exit 1;
+}
+
+my @dtb;
+if ($fdt eq '-') {
+ @dtb = <STDIN>;
+} else {
+ open F, "<$fdt" or die "can't read $fdt: $!";
+ @dtb = <F>;
+ close F;
+}
+
+my $g = (join '@|', @types) . '@';
+@dtb = grep { /$g/ } @dtb;
+foreach (@dtb) {
+ chomp($_);
+ s/^\s*//, s/\s*{$//;
+}
+
+my %iomaps;
+foreach (@dtb) {
+ my ($type, $addr) = split /@/, $_;
+ if (!exists $iomaps{$type}) {
+ $iomaps{$type} = [$addr];
+ } else {
+ push $iomaps{$type}, $addr;
+ }
+}
+
+print <<EOF;
+/*
+ * Generated file. See gen-devtree-iomaps.pl
+ */
+#include "iomaps.h"
+EOF
+print "\nstruct iomap iomaps[] = {\n";
+foreach my $type (keys %iomaps) {
+ @{ $iomaps{$type} } = sort @{ $iomaps{$type} };
+ my $nr = $#{ $iomaps{$type} } + 1;
+ if ($nr > $max_nr) {
+ print STDERR "$type has $nr addrs, but iomaps can only ".
+ "support up to $max_nr.\n";
+ $nr = $max_nr;
+ splice @{ $iomaps{$type} }, $nr;
+ }
+ print "{\n";
+ print " .type = \"$type\",\n";
+ print " .nr = $nr,\n";
+ print " .addrs = {";
+ if ($nr < 5) {
+ my $line = join ', 0x', @{ $iomaps{$type} };
+ print " 0x$line, },\n";
+ print "},\n";
+ next;
+ }
+ print "\n";
+ for (my $i = 0; $i < $nr; $i += 5) {
+ print "\t";
+ my $j = $i;
+ while ($j < $i + 4 && $j < $nr - 1) {
+ print "0x$iomaps{$type}[$j], ";
+ ++$j;
+ }
+ print "0x$iomaps{$type}[$j],\n";
+ }
+ print " },\n";
+ print "},\n";
+}
+print "{\n .type = NULL,\n},\n";
+print "};\n";
+exit 0;
--
1.8.1.4
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