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hw/misc/bcm2835_property: Add missed BCM2835 properties

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Our model of the bcm2835 mailbox is missing a few properties
that we need for the raspi4 kernel:
 * RPI_FWREQ_GET_CLOCKS
 * RPI_FWREQ_GET_THROTTLED
 * RPI_FWREQ_VCHIQ_INIT

Add minimal implementations of them.

Signed-off-by: Sergey Kambalin <sergey.kambalin@auriga.com>
Message-id: 20240226000259.2752893-40-sergey.kambalin@auriga.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
[PMM: improved commit message]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Sergey Kambalin 2024-02-25 18:02:57 -06:00 committed by Peter Maydell
parent 2f79d2ed64
commit cda5a7d640
2 changed files with 32 additions and 0 deletions
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21
hw/misc/bcm2835_property.c
View File

@ -19,6 +19,8 @@
#include "trace.h"
#include "hw/arm/raspi_platform.h"
#define VCHI_BUSADDR_SIZE sizeof(uint32_t)
/* https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface */
static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
@ -138,6 +140,13 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
resplen = 8;
break;
case RPI_FWREQ_GET_CLOCKS:
/* TODO: add more clock IDs if needed */
stl_le_phys(&s->dma_as, value + 12, 0);
stl_le_phys(&s->dma_as, value + 16, RPI_FIRMWARE_ARM_CLK_ID);
resplen = 8;
break;
case RPI_FWREQ_SET_CLOCK_RATE:
case RPI_FWREQ_SET_MAX_CLOCK_RATE:
case RPI_FWREQ_SET_MIN_CLOCK_RATE:
@ -276,6 +285,7 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
stl_le_phys(&s->dma_as, value + 12, 0);
resplen = 4;
break;
case RPI_FWREQ_FRAMEBUFFER_GET_NUM_DISPLAYS:
stl_le_phys(&s->dma_as, value + 12, 1);
resplen = 4;
@ -301,6 +311,17 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
resplen);
break;
case RPI_FWREQ_GET_THROTTLED:
stl_le_phys(&s->dma_as, value + 12, 0);
resplen = 4;
break;
case RPI_FWREQ_VCHIQ_INIT:
stl_le_phys(&s->dma_as,
value + offsetof(rpi_firmware_prop_request_t, payload),
0);
resplen = VCHI_BUSADDR_SIZE;
break;
default:
qemu_log_mask(LOG_UNIMP,
"bcm2835_property: unhandled tag 0x%08x\n", tag);

11
include/hw/arm/raspberrypi-fw-defs.h
View File

@ -159,4 +159,15 @@ enum rpi_firmware_clk_id {
RPI_FIRMWARE_NUM_CLK_ID,
};
struct rpi_firmware_property_tag_header {
uint32_t tag;
uint32_t buf_size;
uint32_t req_resp_size;
};
typedef struct rpi_firmware_prop_request {
struct rpi_firmware_property_tag_header hdr;
uint8_t payload[0];
} rpi_firmware_prop_request_t;
#endif /* INCLUDE_HW_MISC_RASPBERRYPI_FW_DEFS_H_ */