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The boston machine doesn't set MachineState::fdt to the DTB blob that it has loaded or created, which means that the QMP/HMP dumpdtb monitor commands don't work. Setting MachineState::fdt is easy in the non-FIT codepath: we can simply do so immediately before loading the DTB into guest memory. The FIT codepath is a bit more awkward as currently the FIT loader throws away the memory that the FDT was in after it loads it into guest memory. So we add a void *pfdt argument to load_fit() for it to store the FDT pointer into. There is some readjustment required of the pointer handling in loader-fit.c, so that it applies 'const' only where it should (e.g. the data pointer we get back from fdt_getprop() is const, because it's into the middle of the input FDT data, but the pointer that fit_load_image_alloc() should not be const, because it's freshly allocated memory that the caller can change if it likes). Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-id: 20250206151214.2947842-5-peter.maydell@linaro.org
56 lines
2 KiB
C
56 lines
2 KiB
C
/*
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* Flattened Image Tree loader.
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*
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* Copyright (c) 2016 Imagination Technologies
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef HW_LOADER_FIT_H
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#define HW_LOADER_FIT_H
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#include "exec/hwaddr.h"
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struct fit_loader_match {
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const char *compatible;
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const void *data;
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};
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struct fit_loader {
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const struct fit_loader_match *matches;
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hwaddr (*addr_to_phys)(void *opaque, uint64_t addr);
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void *(*fdt_filter)(void *opaque, const void *fdt,
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const void *match_data, hwaddr *load_addr);
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const void *(*kernel_filter)(void *opaque, const void *kernel,
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hwaddr *load_addr, hwaddr *entry_addr);
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};
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/**
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* load_fit: load a FIT format image
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* @ldr: structure defining board specific properties and hooks
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* @filename: image to load
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* @pfdt: pointer to update with address of FDT blob
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* @opaque: opaque value passed back to the hook functions in @ldr
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* Returns: 0 on success, or a negative errno on failure
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*
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* @pfdt is used to tell the caller about the FDT blob. On return, it
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* has been set to point to the FDT blob, and it is now the caller's
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* responsibility to free that memory with g_free(). Usually the caller
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* will want to pass in &machine->fdt here, to record the FDT blob for
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* the dumpdtb option and QMP/HMP commands.
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*/
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int load_fit(const struct fit_loader *ldr, const char *filename, void **pfdt,
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void *opaque);
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#endif /* HW_LOADER_FIT_H */
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