microblaze: factored out common boot code

factored out the copy-pasted common boot code from the two microblaze platforms
into a dedicated microblaze bootloader (microblaze_boot.o).

Signed-off-by: Peter A. G. Crosthwaite <peter.crosthwaite@petalogix.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>

1 files changed, 4 insertions, 123 deletions

diff --git a/hw/petalogix_s3adsp1800_mmu.c b/hw/petalogix_s3adsp1800_mmu.c
index d448a41..7c6e9b8 100644
--- a/hw/petalogix_s3adsp1800_mmu.c
+++ b/hw/petalogix_s3adsp1800_mmu.c
@@ -30,88 +30,17 @@
 #include "sysemu.h"
 #include "devices.h"
 #include "boards.h"
-#include "device_tree.h"
 #include "xilinx.h"
-#include "loader.h"
-#include "elf.h"
 #include "blockdev.h"
 #include "exec-memory.h"
 
+#include "microblaze_boot.h"
 #include "microblaze_pic_cpu.h"
 
 #define LMB_BRAM_SIZE  (128 * 1024)
 #define FLASH_SIZE     (16 * 1024 * 1024)
 
-static struct
-{
-    uint32_t bootstrap_pc;
-    uint32_t cmdline;
-    uint32_t fdt;
-} boot_info;
-
-static void main_cpu_reset(void *opaque)
-{
-    CPUState *env = opaque;
-
-    cpu_reset(env);
-    env->regs[5] = boot_info.cmdline;
-    env->regs[7] = boot_info.fdt;
-    env->sregs[SR_PC] = boot_info.bootstrap_pc;
-}
-
 #define BINARY_DEVICE_TREE_FILE "petalogix-s3adsp1800.dtb"
-static int petalogix_load_device_tree(target_phys_addr_t addr,
-                                      uint32_t ramsize,
-                                      target_phys_addr_t initrd_base,
-                                      target_phys_addr_t initrd_size,
-                                      const char *kernel_cmdline)
-{
-    char *path;
-    int fdt_size;
-#ifdef CONFIG_FDT
-    void *fdt;
-    int r;
-
-    /* Try the local "mb.dtb" override.  */
-    fdt = load_device_tree("mb.dtb", &fdt_size);
-    if (!fdt) {
-        path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
-        if (path) {
-            fdt = load_device_tree(path, &fdt_size);
-            g_free(path);
-        }
-        if (!fdt)
-            return 0;
-    }
-
-    r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline);
-    if (r < 0)
-        fprintf(stderr, "couldn't set /chosen/bootargs\n");
-    cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
-#else
-    /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob
-       to the kernel.  */
-    fdt_size = load_image_targphys("mb.dtb", addr, 0x10000);
-    if (fdt_size < 0) {
-        path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
-        if (path) {
-            fdt_size = load_image_targphys(path, addr, 0x10000);
-	    g_free(path);
-        }
-    }
-
-    if (kernel_cmdline) {
-        fprintf(stderr,
-                "Warning: missing libfdt, cannot pass cmdline to kernel!\n");
-    }
-#endif
-    return fdt_size;
-}
-
-static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
-{
-    return addr - 0x30000000LL;
-}
 
 static void
 petalogix_s3adsp1800_init(ram_addr_t ram_size,
@@ -122,7 +51,6 @@ petalogix_s3adsp1800_init(ram_addr_t ram_size,
 {
     DeviceState *dev;
     CPUState *env;
-    int kernel_size;
     DriveInfo *dinfo;
     int i;
     target_phys_addr_t ddr_base = 0x90000000;
@@ -137,8 +65,8 @@ petalogix_s3adsp1800_init(ram_addr_t ram_size,
     }
     env = cpu_init(cpu_model);
 
+    /* FIXME: move to machine specfic cpu reset */
     env->pvr.regs[10] = 0x0c000000; /* spartan 3a dsp family.  */
-    qemu_register_reset(main_cpu_reset, env);
 
     /* Attach emulated BRAM through the LMB.  */
     memory_region_init_ram(phys_lmb_bram,
@@ -168,55 +96,8 @@ petalogix_s3adsp1800_init(ram_addr_t ram_size,
     xilinx_timer_create(0x83c00000, irq[0], 2, 62 * 1000000);
     xilinx_ethlite_create(&nd_table[0], 0x81000000, irq[1], 0, 0);
 
-    if (kernel_filename) {
-        uint64_t entry, low, high;
-        uint32_t base32;
-        int big_endian = 0;
-
-#ifdef TARGET_WORDS_BIGENDIAN
-        big_endian = 1;
-#endif
-
-        /* Boots a kernel elf binary.  */
-        kernel_size = load_elf(kernel_filename, NULL, NULL,
-                               &entry, &low, &high,
-                               big_endian, ELF_MACHINE, 0);
-        base32 = entry;
-        if (base32 == 0xc0000000) {
-            kernel_size = load_elf(kernel_filename, translate_kernel_address,
-                                   NULL, &entry, NULL, NULL,
-                                   big_endian, ELF_MACHINE, 0);
-        }
-        /* Always boot into physical ram.  */
-        boot_info.bootstrap_pc = ddr_base + (entry & 0x0fffffff);
-
-        /* If it wasn't an ELF image, try an u-boot image.  */
-        if (kernel_size < 0) {
-            target_phys_addr_t uentry, loadaddr;
-
-            kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0);
-            boot_info.bootstrap_pc = uentry;
-            high = (loadaddr + kernel_size + 3) & ~3;
-        }
-
-        /* Not an ELF image nor an u-boot image, try a RAW image.  */
-        if (kernel_size < 0) {
-            kernel_size = load_image_targphys(kernel_filename, ddr_base,
-                                              ram_size);
-            boot_info.bootstrap_pc = ddr_base;
-            high = (ddr_base + kernel_size + 3) & ~3;
-        }
-
-        boot_info.cmdline = high + 4096;
-        if (kernel_cmdline && strlen(kernel_cmdline)) {
-            pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
-        }
-        /* Provide a device-tree.  */
-        boot_info.fdt = boot_info.cmdline + 4096; 
-        petalogix_load_device_tree(boot_info.fdt, ram_size,
-                                   0, 0,
-                                   kernel_cmdline);
-    }
+    microblaze_load_kernel(env, ddr_base, ram_size,
+                    BINARY_DEVICE_TREE_FILE, NULL);
 }
 
 static QEMUMachine petalogix_s3adsp1800_machine = {