lib: add helper for constructing coreboot forwarding table
The x86 architecture needs to add a forwarding table to the real coreboot table. Provide a helper function to do this for aligning the architectures on a common write_tables() implementation. Change-Id: I9a2875507e6260679874a654ddf97b879222d44e Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/14433 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com>
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@ -9,6 +9,12 @@ unsigned long write_coreboot_table(
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unsigned long low_table_start, unsigned long low_table_end,
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unsigned long rom_table_start, unsigned long rom_table_end);
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/*
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* Write forwarding table of target address at entry address returning size
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* of table written.
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*/
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size_t write_coreboot_forwarding_table(uintptr_t entry, uintptr_t target);
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void fill_lb_gpios(struct lb_gpios *gpios);
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void lb_add_gpios(struct lb_gpios *gpios, const struct lb_gpio *gpio_table,
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size_t count);
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@ -445,6 +445,19 @@ static unsigned long lb_table_fini(struct lb_header *head)
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return (unsigned long)rec + rec->size;
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}
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size_t write_coreboot_forwarding_table(uintptr_t entry, uintptr_t target)
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{
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struct lb_header *head;
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printk(BIOS_DEBUG, "Writing table forward entry at 0x%p\n",
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(void *)entry);
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head = lb_table_init(entry);
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lb_forward(head, (struct lb_header*)target);
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return (uintptr_t)lb_table_fini(head) - entry;
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}
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unsigned long write_coreboot_table(
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unsigned long low_table_start, unsigned long low_table_end,
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unsigned long rom_table_start __unused, unsigned long rom_table_end)
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