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f802ff1e28
This query copies the kernel command line into the message buffer. It was previously stubbed out to return empty, this commit makes it reflect the arguments specified with `-append`. I observed the following peculiarities on my Pi 3B+: - If the buffer is shorter than the string, the response header gives the full length, but no data is actually copied. - No NUL terminator is added: even if the buffer is long enough to fit one, the buffer's original contents are preserved past the string's end. - The VC firmware adds the following extra parameters beside the user-supplied ones (via /boot/cmdline.txt): `video`, `vc_mem.mem_base` and `vc_mem.mem_size`. This is currently not implemented in qemu. Signed-off-by: Daniel Bertalan <dani@danielbertalan.dev> Message-id: 20230425103250.56653-1-dani@danielbertalan.dev Reviewed-by: Peter Maydell <peter.maydell@linaro.org> [PMM: added comment about NUL and short-buffer behaviour] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
38 lines
805 B
C
38 lines
805 B
C
/*
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* Raspberry Pi emulation (c) 2012 Gregory Estrade
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef BCM2835_PROPERTY_H
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#define BCM2835_PROPERTY_H
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#include "hw/sysbus.h"
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#include "net/net.h"
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#include "hw/display/bcm2835_fb.h"
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#include "qom/object.h"
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#define TYPE_BCM2835_PROPERTY "bcm2835-property"
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OBJECT_DECLARE_SIMPLE_TYPE(BCM2835PropertyState, BCM2835_PROPERTY)
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struct BCM2835PropertyState {
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/*< private >*/
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SysBusDevice busdev;
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/*< public >*/
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MemoryRegion *dma_mr;
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AddressSpace dma_as;
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MemoryRegion iomem;
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qemu_irq mbox_irq;
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BCM2835FBState *fbdev;
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MACAddr macaddr;
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uint32_t board_rev;
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uint32_t addr;
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char *command_line;
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bool pending;
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};
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#endif
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