From 2887165ae2990e7f93038f3220ed74ee429b5244 Mon Sep 17 00:00:00 2001
From: Megan Wachs <megan@sifive.com>
Date: Wed, 20 Jul 2016 23:59:02 +0000
Subject: Initial Checkin

---
 bootrom/common/bram.ld | 40 ++++++++++++++++++++++++++++++++
 bootrom/common/mem.awk | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 103 insertions(+)
 create mode 100644 bootrom/common/bram.ld
 create mode 100644 bootrom/common/mem.awk

(limited to 'bootrom/common')

diff --git a/bootrom/common/bram.ld b/bootrom/common/bram.ld
new file mode 100644
index 0000000..45df67f
--- /dev/null
+++ b/bootrom/common/bram.ld
@@ -0,0 +1,40 @@
+OUTPUT_ARCH("riscv")
+ENTRY(_start)
+
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x00001000, LENGTH = 4K
+	ram (rwx) : ORIGIN = 0x80000000, LENGTH = 256M
+}
+
+SECTIONS
+{
+	PROVIDE(_rom = ORIGIN(rom));
+	PROVIDE(_rom_end = _rom + LENGTH(rom));
+	PROVIDE(_ram = ORIGIN(ram));
+	PROVIDE(_ram_end = _ram + LENGTH(ram));
+
+	.text : {
+		PROVIDE(_ftext = .);
+		*(.text.init)
+		*(.text .text.* .gnu.linkonce.t.*)
+		PROVIDE(_etext = .);
+	} > rom
+
+	.rodata : {
+		*(.rodata .rodata.* .gnu.linkonce.r.*)
+	} > rom
+
+	.bss : ALIGN(8) {
+		PROVIDE(_fbss = .);
+		*(.bss .bss.* .gnu.linkonce.b.*)
+		*(.sbss .sbss.* .gnu.linkonce.sb.*)
+		. = ALIGN(8);
+		PROVIDE(_ebss = .);
+	} > ram
+
+	. += 0x1000;
+	PROVIDE(_sp = NEXT(0x1000));
+
+	PROVIDE(_end = .);
+}
diff --git a/bootrom/common/mem.awk b/bootrom/common/mem.awk
new file mode 100644
index 0000000..3003b56
--- /dev/null
+++ b/bootrom/common/mem.awk
@@ -0,0 +1,63 @@
+BEGIN {
+	RS = ORS = "\r\n"
+	addr = 0
+	buf = ""
+	limit = (WIDTH > 0 ? WIDTH / 4 : 16)
+	print "@00000000"
+}
+
+# Portable strtonum() replacement
+function atoi(str,	x, n, i, b, c) {
+	if (str ~ /^0[0-7]*$/) {
+		i = 2
+		b = 8
+	} else if (str ~ /^0[xX][[:xdigit:]]+$/) {
+		i = 3
+		b = 16
+	} else {
+		return str
+	}
+
+	x = 0
+	n = length(str)
+	for (; i <= n; i++) {
+		c = tolower(substr(str, i , 1))
+		c = index("123456789abcdef", c)
+		x = (x * b) + c
+	}
+	return x
+}
+
+function out(x) {
+	addr++
+	buf = (REVERSE ? buf x : x buf)
+	if (length(buf) >= limit) {
+		print buf
+		buf = ""
+	}
+}
+
+function pad(n) {
+	while (addr < n) {
+		out("00")
+	}
+}
+
+match($1, /^@[[:xdigit:]]+/) {
+	pad(atoi("0x" substr($1, RSTART+1, RLENGTH-1)))
+	next
+}
+
+{
+	for (i = 1; i <= NF; i++) {
+		out($i)
+	}
+}
+
+END {
+	align = limit / 2
+	pad(int((addr + align - 1) / align) * align)
+	if (length(buf) > 0) {
+		print buf;
+	}
+}
-- 
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