--- /dev/null
+ARCH = $(shell uname -m)
+ifneq ("$(ARCH)", "ppc64")
+ifneq ("$(ARCH)", "ppc64le")
+ CROSS_COMPILE ?= powerpc64le-linux-gnu-
+endif
+endif
+
+CC = $(CROSS_COMPILE)gcc
+LD = $(CROSS_COMPILE)ld
+OBJCOPY = $(CROSS_COMPILE)objcopy
+
+CFLAGS = -Os -g -Wall -std=c99 -msoft-float -mno-string -mno-multiple -mno-vsx -mno-altivec -mlittle-endian -fno-stack-protector -mstrict-align -ffreestanding -fdata-sections -ffunction-sections -I../include
+ASFLAGS = $(CFLAGS)
+LDFLAGS = -T powerpc.lds
+
+all: hello_world.hex
+
+console.o: ../lib/console.c
+ $(CC) $(CPPFLAGS) $(CFLAGS) -c $< -o $@
+
+hello_world.elf: hello_world.o head.o console.o
+ $(LD) $(LDFLAGS) -o $@ $^
+
+hello_world.bin: hello_world.elf
+ $(OBJCOPY) -O binary $^ $@
+
+hello_world.hex: hello_world.bin
+ ../scripts/bin2hex.py $^ > hello_world.hex.tmp
+ mv -f hello_world.hex.tmp hello_world.hex
+
+clean:
+ @rm -f *.o hello_world.elf hello_world.bin hello_world.hex
+distclean: clean
+ rm -f *~
+
--- /dev/null
+/* Copyright 2013-2014 IBM Corp.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ * implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define STACK_TOP 0x2000
+
+#define FIXUP_ENDIAN \
+ tdi 0,0,0x48; /* Reverse endian of b . + 8 */ \
+ b 191f; /* Skip trampoline if endian is good */ \
+ .long 0xa600607d; /* mfmsr r11 */ \
+ .long 0x01006b69; /* xori r11,r11,1 */ \
+ .long 0x05009f42; /* bcl 20,31,$+4 */ \
+ .long 0xa602487d; /* mflr r10 */ \
+ .long 0x14004a39; /* addi r10,r10,20 */ \
+ .long 0xa64b5a7d; /* mthsrr0 r10 */ \
+ .long 0xa64b7b7d; /* mthsrr1 r11 */ \
+ .long 0x2402004c; /* hrfid */ \
+191:
+
+
+/* Load an immediate 64-bit value into a register */
+#define LOAD_IMM64(r, e) \
+ lis r,(e)@highest; \
+ ori r,r,(e)@higher; \
+ rldicr r,r, 32, 31; \
+ oris r,r, (e)@h; \
+ ori r,r, (e)@l;
+
+ .section ".head","ax"
+
+ /*
+ * Microwatt currently enters in LE mode at 0x0, so we don't need to
+ * do any endian fix ups>
+ */
+ . = 0
+.global _start
+_start:
+ b boot_entry
+
+ /* QEMU enters at 0x10 */
+ . = 0x10
+ FIXUP_ENDIAN
+ b boot_entry
+
+ . = 0x100
+ FIXUP_ENDIAN
+ b boot_entry
+
+.global boot_entry
+boot_entry:
+ LOAD_IMM64(%r10,__bss_start)
+ LOAD_IMM64(%r11,__bss_end)
+ subf %r11,%r10,%r11
+ addi %r11,%r11,63
+ srdi. %r11,%r11,6
+ beq 2f
+ mtctr %r11
+1: dcbz 0,%r10
+ addi %r10,%r10,64
+ bdnz 1b
+
+ /* setup stack */
+2: LOAD_IMM64(%r1,__stack_top)
+ li %r0,0
+ stdu %r0,-32(%r1)
+ LOAD_IMM64(%r12, main)
+ mtctr %r12
+ bctrl
+ attn // terminate on exit
+ b .
+
+#define EXCEPTION(nr) \
+ .= nr ;\
+ b .
+
+ /* More exception stubs */
+ EXCEPTION(0x300)
+ EXCEPTION(0x380)
+ EXCEPTION(0x400)
+ EXCEPTION(0x480)
+ EXCEPTION(0x500)
+ EXCEPTION(0x600)
+ EXCEPTION(0x700)
+ EXCEPTION(0x800)
+ EXCEPTION(0x900)
+ EXCEPTION(0x980)
+ EXCEPTION(0xa00)
+ EXCEPTION(0xb00)
+
+ . = 0xC00
+ mfsrr0 3
+ mfsrr1 4
+ mfmsr 5
+ rfid
+
+ EXCEPTION(0xd00)
+ EXCEPTION(0xe00)
+ EXCEPTION(0xe20)
+ EXCEPTION(0xe40)
+ EXCEPTION(0xe60)
+ EXCEPTION(0xe80)
+ EXCEPTION(0xf00)
+ EXCEPTION(0xf20)
+ EXCEPTION(0xf40)
+ EXCEPTION(0xf60)
+ EXCEPTION(0xf80)
+#if 0
+ EXCEPTION(0x1000)
+ EXCEPTION(0x1100)
+ EXCEPTION(0x1200)
+ EXCEPTION(0x1300)
+ EXCEPTION(0x1400)
+ EXCEPTION(0x1500)
+ EXCEPTION(0x1600)
+#endif
--- /dev/null
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "console.h"
+#include "io.h"
+#include "microwatt_soc.h"
+
+static char mw_logo1[] =
+"\n"
+" .oOOo. \n"
+" .\" \". \n"
+" ; .mw. ; Microwatt, it works.\n"
+" . ' ' . \n"
+" \\ || / HDL Git SHA1: ";
+
+static char mw_logo2[] =
+"\n"
+" ;..; \n"
+" ;..; \n"
+" `ww' \n\n";
+
+void write_hex(uint64_t v)
+{
+ puts("0x");
+ for(int i = 15; i >= 0; i--)
+ {
+ uint8_t digit = (v >> 4 * i) & 0xF;
+ if(digit >= 10)
+ {
+ putchar('A' + (digit - 10));
+ }
+ else
+ {
+ putchar('0' + digit);
+ }
+ }
+}
+
+void test_sc(uint64_t srr0, uint64_t srr1, uint64_t msr)
+{
+ puts("before sc:\n");
+ puts("SRR0 = ");
+ write_hex(srr0);
+ puts(" SRR1 = ");
+ write_hex(srr1);
+ puts(" MSR = ");
+ write_hex(msr);
+ puts("\nsc");
+ register uint64_t srr0_ __asm("r3");
+ register uint64_t srr1_ __asm("r4");
+ register uint64_t msr_ __asm("r5");
+ srr0_ = srr0;
+ srr1_ = srr1;
+ msr_ = msr;
+ __asm(
+ "mtsrr0 3\n\t"
+ "mtsrr1 4\n\t"
+ "mtmsrd 5\n\t"
+ "sc"
+ : "+r"(srr0_), "+r"(srr1_), "+r"(msr_));
+ srr0 = srr0_;
+ srr1 = srr1_;
+ msr = msr_;
+ puts("\nafter sc:\n");
+ puts("SRR0 = ");
+ write_hex(srr0);
+ puts(" SRR1 = ");
+ write_hex(srr1);
+ puts(" MSR = ");
+ write_hex(msr);
+ puts("\n");
+}
+
+int main(void)
+{
+ uint64_t gitinfo;
+ uint8_t c;
+ bool dirty;
+
+ console_init();
+
+ test_sc(0x12345678, 0x5678, 0x90000000783f2903ULL);
+ test_sc(0x12345678, 0x5678, 0x9000000000000003ULL);
+
+ puts(mw_logo1);
+
+ gitinfo = readq(SYSCON_BASE + SYS_REG_GIT_INFO);
+ dirty = gitinfo >> 63;
+ for (int i = 0; i < 14; i++) {
+ c = (gitinfo >> 52) & 0xf;
+ if (c >= 10)
+ putchar(0x61 + c - 10); // a-f
+ else
+ putchar(0x30 + c); // 0-9
+ gitinfo <<= 4;
+ }
+ if (dirty)
+ puts("-dirty");
+ puts(mw_logo2);
+
+ while (1) {
+ unsigned char c = getchar();
+ putchar(c);
+ if (c == 13) // if CR send LF
+ putchar(10);
+ }
+}
--- /dev/null
+SECTIONS
+{
+ . = 0;
+ _start = .;
+ .head : {
+ KEEP(*(.head))
+ }
+ . = 0x1000;
+ .text : { *(.text) *(.text.*) *(.rodata) *(.rodata.*) }
+ . = 0x1800;
+ .data : { *(.data) *(.data.*) *(.got) *(.toc) }
+ . = ALIGN(0x80);
+ __bss_start = .;
+ .bss : {
+ *(.dynsbss)
+ *(.sbss)
+ *(.scommon)
+ *(.dynbss)
+ *(.bss)
+ *(.common)
+ *(.bss.*)
+ }
+ . = ALIGN(0x80);
+ __bss_end = .;
+ . = . + 0x2000;
+ __stack_top = .;
+}
projects / microwatt.git / commitdiff