public static void bootFromURIWithDT(
ARMv5 cpu, RAM ramMain, String dtree, String kimage, String initrd, String cmdline) {
byte[] cmdlb = cmdline.getBytes();
// +1: need null char at the end of line
byte[] cmdalign = new byte[(cmdlb.length + 1 + 3) & ~0x3];
System.arraycopy(cmdlb, 0, cmdalign, 0, cmdlb.length);
final int addrRAM = 0x00000000;
final int addrDT = addrRAM + 0x800000;
int sizeDT = 0;
final int addrImage = addrRAM + 0x008000;
int sizeImage = 0;
final int addrInitrd = addrRAM + 0x00810000;
int sizeInitrd = 0;
boolean initrdExist = !initrd.equals("");
// tentative boot loader for ARM Linux with Device Tree
try {
// load Device Tree Blob
sizeDT = loadURIResource(new URI(dtree), cpu, addrDT);
// load Image file
sizeImage = loadURIResource(new URI(kimage), cpu, addrImage);
// load Initrd/InitramFS file
if (initrdExist) {
sizeInitrd = loadURIResource(new URI(initrd), cpu, addrInitrd);
}
} catch (URISyntaxException e) {
e.printStackTrace(System.err);
return;
}
// report address mapping
System.out.printf(
"Address mapping:\n"
+ " RAM : 0x%08x\n"
+ " DeviceTree: 0x%08x - 0x%08x\n"
+ " Kernel : 0x%08x - 0x%08x\n"
+ " InitramFS : 0x%08x - 0x%08x\n",
addrRAM,
addrDT,
addrDT + sizeDT - 1,
addrImage,
addrImage + sizeImage - 1,
addrInitrd,
addrInitrd + sizeInitrd - 1);
// r0: 0
cpu.setReg(0, 0);
// r1: Do not care.
cpu.setReg(1, 0);
// r2: Device tree blob pointer.
cpu.setReg(2, addrDT);
// pc: entry of stext
cpu.setPC(addrImage);
cpu.setJumped(false);
}
public static void bootFromURI(
ARMv5 cpu, RAM ramMain, String kimage, String initrd, String cmdline) {
byte[] cmdlb = cmdline.getBytes();
// +1: need null char at the end of line
byte[] cmdalign = new byte[(cmdlb.length + 1 + 3) & ~0x3];
System.arraycopy(cmdlb, 0, cmdalign, 0, cmdlb.length);
final int addrRAM = 0x00000000;
final int addrAtagsStart = addrRAM + 0x800000;
int addrAtags = addrAtagsStart;
final int addrImage = addrRAM + 0x00008000;
int sizeImage = 0;
final int addrInitrd = addrRAM + 0x00810000;
int sizeInitrd = 0;
boolean initrdExist = !initrd.equals("");
// tentative boot loader for ARM Linux
try {
// load Image file
sizeImage = loadURIResource(new URI(kimage), cpu, addrImage);
// load Initrd/InitramFS file
if (initrdExist) {
sizeInitrd = loadURIResource(new URI(initrd), cpu, addrInitrd);
}
} catch (URISyntaxException e) {
e.printStackTrace(System.err);
return;
}
// report address mapping
System.out.printf(
"Address mapping:\n"
+ " RAM : 0x%08x\n"
+ " Kernel: 0x%08x - 0x%08x\n"
+ " Initrd: 0x%08x - 0x%08x\n"
+ " ATAGS : 0x%08x - 0x%08x\n",
addrRAM,
addrImage,
addrImage + sizeImage - 1,
addrInitrd,
addrInitrd + sizeInitrd - 1,
addrAtags,
addrAtags + 4096 - 1);
// r0: 0
cpu.setReg(0, 0);
// r1: machine type
// ARM-Versatile PB
cpu.setReg(1, 0x00000183);
// ARM-Versatile AB
// cpu.setReg(1, 0x0000025e);
// r2: ATAGS pointer.
cpu.setReg(2, addrAtags);
{
// ATAG_CORE, size, tag, [flags, pagesize, rootdev]
cpu.write32_a32(addrAtags + 0x00, 0x00000005);
cpu.write32_a32(addrAtags + 0x04, ATAG_CORE);
// bit 0: read only
cpu.write32(addrAtags + 0x08, 0x00000001);
cpu.write32(addrAtags + 0x0c, 0x00001000);
cpu.write32(addrAtags + 0x10, 0x00000000);
addrAtags += 0x14;
// ATAG_MEM, size, tag, size, start
cpu.write32_a32(addrAtags + 0x00, 0x00000004);
cpu.write32_a32(addrAtags + 0x04, ATAG_MEM);
cpu.write32_a32(addrAtags + 0x08, ramMain.getSize());
cpu.write32_a32(addrAtags + 0x0c, addrRAM);
addrAtags += 0x10;
// ATAG_INITRD2, size, tag, size, start
if (initrdExist) {
cpu.write32_a32(addrAtags + 0x00, 0x00000004);
cpu.write32_a32(addrAtags + 0x04, ATAG_INITRD2);
cpu.write32_a32(addrAtags + 0x08, addrInitrd);
cpu.write32_a32(addrAtags + 0x0c, sizeInitrd);
addrAtags += 0x10;
}
// ATAG_CMDLINE
cpu.write32_a32(addrAtags + 0x00, 0x00000002 + cmdalign.length / 4);
cpu.write32_a32(addrAtags + 0x04, ATAG_CMDLINE);
for (int i = 0; i < cmdalign.length; i++) {
cpu.write8_a32(addrAtags + 0x08 + i, cmdalign[i]);
}
addrAtags += 0x08 + cmdalign.length;
// ATAG_SERIAL, size, tag, low, high
cpu.write32_a32(addrAtags + 0x00, 0x00000004);
cpu.write32_a32(addrAtags + 0x04, ATAG_SERIAL);
cpu.write32_a32(addrAtags + 0x08, 0x00000020);
cpu.write32_a32(addrAtags + 0x0c, 0x00000030);
addrAtags += 0x10;
// ATAG_REVISION, size, tag, rev
cpu.write32_a32(addrAtags + 0x00, 0x00000003);
cpu.write32_a32(addrAtags + 0x04, ATAG_REVISION);
cpu.write32_a32(addrAtags + 0x08, 0x00000010);
addrAtags += 0x0c;
// ATAG_NONE, size, tag
// It is unique in that its size field in the header
// should be set to 0 (not 2).
cpu.write32_a32(addrAtags + 0x00, 0x00000000);
cpu.write32_a32(addrAtags + 0x04, ATAG_NONE);
addrAtags += 0x08;
}
// pc: entry of stext
cpu.setPC(addrImage);
cpu.setJumped(false);
}