Merge tag 'pull-or1k-20220904' of https://github.com/stffrdhrn/qemu into staging

OpenRISC updates for 7.2.0

Updates to add the OpenRISC virt plaform to QEMU. Highlights
include:

- New virt plaform with, virtio and pci bus support
- OpenRISC support for MTTCG
- Goldfish RTC device endianness is configurable now

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# gpg: Signature made Sun 04 Sep 2022 02:31:58 EDT
# gpg:                using RSA key D9C47354AEF86C103A25EFF1C3B31C2D5E6627E4
# gpg: Good signature from "Stafford Horne <shorne@gmail.com>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: D9C4 7354 AEF8 6C10 3A25  EFF1 C3B3 1C2D 5E66 27E4

* tag 'pull-or1k-20220904' of https://github.com/stffrdhrn/qemu:
  docs/system: openrisc: Add OpenRISC documentation
  hw/openrisc: virt: pass random seed to fdt
  target/openrisc: Interrupt handling fixes
  target/openrisc: Enable MTTCG
  target/openrisc: Add interrupted CPU to log
  hw/openrisc: Initialize timer time at startup
  hw/openrisc: Add PCI bus support to virt
  hw/openrisc: Add the OpenRISC virtual machine
  goldfish_rtc: Add big-endian property
  target/openrisc: Fix memory reading in debugger
  hw/openrisc: Split re-usable boot time apis out to boot.c

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 116 insertions, 0 deletions

diff --git a/hw/openrisc/boot.c b/hw/openrisc/boot.c
new file mode 100644
index 0000000000..128ccbcba2
--- /dev/null
+++ b/hw/openrisc/boot.c
@@ -0,0 +1,116 @@
+/*
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * QEMU OpenRISC boot helpers.
+ *
+ * (c) 2022 Stafford Horne <shorne@gmail.com>
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "exec/cpu-defs.h"
+#include "elf.h"
+#include "hw/loader.h"
+#include "hw/openrisc/boot.h"
+#include "sysemu/device_tree.h"
+#include "sysemu/qtest.h"
+
+#include <libfdt.h>
+
+#define KERNEL_LOAD_ADDR 0x100
+
+hwaddr openrisc_load_kernel(ram_addr_t ram_size,
+                            const char *kernel_filename,
+                            uint32_t *bootstrap_pc)
+{
+    long kernel_size;
+    uint64_t elf_entry;
+    uint64_t high_addr;
+    hwaddr entry;
+
+    if (kernel_filename && !qtest_enabled()) {
+        kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
+                               &elf_entry, NULL, &high_addr, NULL, 1,
+                               EM_OPENRISC, 1, 0);
+        entry = elf_entry;
+        if (kernel_size < 0) {
+            kernel_size = load_uimage(kernel_filename,
+                                      &entry, NULL, NULL, NULL, NULL);
+            high_addr = entry + kernel_size;
+        }
+        if (kernel_size < 0) {
+            kernel_size = load_image_targphys(kernel_filename,
+                                              KERNEL_LOAD_ADDR,
+                                              ram_size - KERNEL_LOAD_ADDR);
+            high_addr = KERNEL_LOAD_ADDR + kernel_size;
+        }
+
+        if (entry <= 0) {
+            entry = KERNEL_LOAD_ADDR;
+        }
+
+        if (kernel_size < 0) {
+            error_report("couldn't load the kernel '%s'", kernel_filename);
+            exit(1);
+        }
+        *bootstrap_pc = entry;
+
+        return high_addr;
+    }
+    return 0;
+}
+
+hwaddr openrisc_load_initrd(void *fdt, const char *filename,
+                            hwaddr load_start, uint64_t mem_size)
+{
+    int size;
+    hwaddr start;
+
+    /* We put the initrd right after the kernel; page aligned. */
+    start = TARGET_PAGE_ALIGN(load_start);
+
+    size = load_ramdisk(filename, start, mem_size - start);
+    if (size < 0) {
+        size = load_image_targphys(filename, start, mem_size - start);
+        if (size < 0) {
+            error_report("could not load ramdisk '%s'", filename);
+            exit(1);
+        }
+    }
+
+    if (fdt) {
+        qemu_fdt_setprop_cell(fdt, "/chosen",
+                              "linux,initrd-start", start);
+        qemu_fdt_setprop_cell(fdt, "/chosen",
+                              "linux,initrd-end", start + size);
+    }
+
+    return start + size;
+}
+
+uint32_t openrisc_load_fdt(void *fdt, hwaddr load_start,
+                           uint64_t mem_size)
+{
+    uint32_t fdt_addr;
+    int ret;
+    int fdtsize = fdt_totalsize(fdt);
+
+    if (fdtsize <= 0) {
+        error_report("invalid device-tree");
+        exit(1);
+    }
+
+    /* We put fdt right after the kernel and/or initrd. */
+    fdt_addr = TARGET_PAGE_ALIGN(load_start);
+
+    ret = fdt_pack(fdt);
+    /* Should only fail if we've built a corrupted tree */
+    g_assert(ret == 0);
+    /* copy in the device tree */
+    qemu_fdt_dumpdtb(fdt, fdtsize);
+
+    rom_add_blob_fixed_as("fdt", fdt, fdtsize, fdt_addr,
+                          &address_space_memory);
+
+    return fdt_addr;
+}