[NOTFORMERGE PATCH 2/2] RFC: hw/arm/raspi: Add the Raspberry Pi Zero machine

[Philippe Mathieu-Daudé]

Add a Raspberry Pi Zero machine.

  $ qemu-system-arm -M raspi0 -serial stdio \
      -kernel raspberrypi/firmware/boot/kernel.img \
      -dtb raspberrypi/firmware/boot/bcm2708-rpi-zero-w.dtb \
      -append 'printk.time=0 earlycon=pl011,0x20201000 console=ttyAMA0'
  [    0.000000] Booting Linux on physical CPU 0x0
  [    0.000000] Linux version 4.19.69+ (dom@buildbot) (gcc version 4.9.3 
(crosstool-NG crosstool-ng-1.22.0-88-g8460611)) #1261 Tue Sep 3 20:21:01 BST 
2019
  [    0.000000] CPU: ARMv6-compatible processor [410fb767] revision 7 (ARMv7), 
cr=00c5387d
  [    0.000000] CPU: VIPT aliasing data cache, unknown instruction cache
  [    0.000000] OF: fdt: Machine model: Raspberry Pi Zero W
  [    0.000000] earlycon: pl11 at MMIO 0x20201000 (options '')
  [    0.000000] bootconsole [pl11] enabled
  [    0.000000] Memory policy: Data cache writeback
  [    0.000000] cma: Reserved 8 MiB at 0x1b800000
  [    0.000000] random: get_random_bytes called from start_kernel+0x8c/0x49c 
with crng_init=0
  [    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 113680
  [    0.000000] Kernel command line: printk.time=0 earlycon=pl011,0x20201000 
console=ttyAMA0 root=/dev/mmcblk0 rootwait
  Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
  Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
  Memory: 434380K/458752K available (6971K kernel code, 635K rwdata, 2080K 
rodata, 464K init, 797K bss, 16180K reserved, 8192K cma-reserved)
  Virtual kernel memory layout:
      vector  : 0xffff0000 - 0xffff1000   (   4 kB)
      fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
      vmalloc : 0xdc800000 - 0xff800000   ( 560 MB)
      lowmem  : 0xc0000000 - 0xdc000000   ( 448 MB)
      modules : 0xbf000000 - 0xc0000000   (  16 MB)
        .text : 0x(ptrval) - 0x(ptrval)   (6973 kB)
        .init : 0x(ptrval) - 0x(ptrval)   ( 464 kB)
        .data : 0x(ptrval) - 0x(ptrval)   ( 636 kB)
         .bss : 0x(ptrval) - 0x(ptrval)   ( 798 kB)
  SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
  ftrace: allocating 25193 entries in 74 pages
  NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
  sched_clock: 32 bits at 1000kHz, resolution 1000ns, wraps every 
2147483647500ns
  clocksource: timer: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 
1911260446275 ns
  bcm2835: system timer (irq = 27)
  Console: colour dummy device 80x30
  ...

Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
---
TODO: Add acceptance test

 hw/arm/raspi.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/hw/arm/raspi.c b/hw/arm/raspi.c
index aff5d57261..f2496a5590 100644
--- a/hw/arm/raspi.c
+++ b/hw/arm/raspi.c
@@ -33,6 +33,7 @@
 #define MACH_TYPE_BCM2708   3138 /* Linux board IDs */
 
 enum BoardIdChip {
+    C_BCM2835 = 0,
     C_BCM2836 = 1,
     C_BCM2837 = 2,
 };
@@ -41,6 +42,7 @@ static const struct {
     const char *soc_name;
     int cores_count;
 } soc_config[] = {
+    [C_BCM2835] = {TYPE_BCM2835, 1},
     [C_BCM2836] = {TYPE_BCM2836, BCM283X_NCPUS},
     [C_BCM2837] = {TYPE_BCM2837, BCM283X_NCPUS},
 };
@@ -80,6 +82,11 @@ typedef struct RaspiMachineClass {
      OBJECT_GET_CLASS(RaspiMachineClass, (obj), TYPE_RASPI_MACHINE)
 
 static const RaspiBoardInfo raspi_boards[] = {
+    {
+        .name = MACHINE_TYPE_NAME("raspi0"),
+        .desc = "Raspberry Pi Zero W",
+        .board_rev = 0x9000c1,
+    },
     {
         .name = MACHINE_TYPE_NAME("raspi2"),
         .desc = "Raspberry Pi 2B",
-- 
2.21.1