Kludge when using Linux kernels to reach userland.
No device in DT -> no hardware initialization.
Linux 5.9 uses the RPI_FIRMWARE_GET_CLOCKS so we now need to
implement that feature too. Look like a cat and mouse game...
Signed-off-by: Philippe Mathieu-Daudé <f4...@amsat.org>
---
hw/arm/raspi.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/hw/arm/raspi.c b/hw/arm/raspi.c
index 6a793766840..93eb6591ee8 100644
--- a/hw/arm/raspi.c
+++ b/hw/arm/raspi.c
@@ -25,6 +25,7 @@
#include "hw/arm/boot.h"
#include "sysemu/sysemu.h"
#include "qom/object.h"
+#include <libfdt.h>
#define SMPBOOT_ADDR 0x300 /* this should leave enough space for ATAGS */
#define MVBAR_ADDR 0x400 /* secure vectors */
@@ -200,6 +201,29 @@ static void reset_secondary(ARMCPU *cpu, const struct
arm_boot_info *info)
cpu_set_pc(cs, info->smp_loader_start);
}
+static void raspi4_modify_dtb(const struct arm_boot_info *info, void *fdt)
+{
+ int offset;
+
+ offset = fdt_node_offset_by_compatible(fdt, -1, "brcm,genet-v5");
+ if (offset >= 0) {
+ /* FIXME we shouldn't nop the parent */
+ offset = fdt_parent_offset(fdt, offset);
+ if (offset >= 0) {
+ if (!fdt_nop_node(fdt, offset)) {
+ warn_report("dtc: bcm2838-genet removed!");
+ }
+ }
+ }
+
+ offset = fdt_node_offset_by_compatible(fdt, -1, "brcm,avs-tmon-bcm2838");
+ if (offset >= 0) {
+ if (!fdt_nop_node(fdt, offset)) {
+ warn_report("dtc: bcm2838-tmon removed!");
+ }
+ }
+}
+
static void setup_boot(MachineState *machine, RaspiProcessorId processor_id,
size_t ram_size)
{
@@ -234,6 +258,9 @@ static void setup_boot(MachineState *machine,
RaspiProcessorId processor_id,
}
s->binfo.secondary_cpu_reset_hook = reset_secondary;
}
+ if (processor_id >= PROCESSOR_ID_BCM2838) {
+ s->binfo.modify_dtb = raspi4_modify_dtb;
+ }
/* If the user specified a "firmware" image (e.g. UEFI), we bypass
* the normal Linux boot process
--
2.26.2
