summaryrefslogtreecommitdiff
path: root/bootrom/common
diff options
context:
space:
mode:
Diffstat (limited to 'bootrom/common')
-rw-r--r--bootrom/common/bram.ld40
-rw-r--r--bootrom/common/mem.awk63
2 files changed, 103 insertions, 0 deletions
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;
+ }
+}