view target-utils/include/romvars.h @ 926:6a0aa8d36d06

rvinterf backslash escape: introduce libprint The new helper function library named libprint is meant to replace the badly misnamed libg23, and will soon contain functions for printing all of the same kinds of GPF TST packets that are now handled in libg23. However, we are also moving safe_print_trace() from libasync to this new library, and changing it to emit our new backslash escape format.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 23 May 2023 03:47:46 +0000
parents e7502631a0f9
children
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/*
 * Our loadagent will always be loaded into Calypso targets by the on-chip
 * boot ROM operating in the UART download mode.  The lowest IRAM address
 * at which we can load our code is 0x800750; somewhat lower at 0x800518
 * the boot ROM downloader has a few variables which may have been intended
 * to be private to the boot ROM, but which are useful to us.  For example,
 * by looking at these variables, we can see which of the two UARTs was
 * used to feed our code to the boot ROM, and use the same UART for
 * subsequent communication - without building multiple versions of our
 * loadagent or resorting to other ugliness.
 *
 * This header file defines the layout of the IRAM structure in question,
 * based on the disassembly of the boot ROM.
 */

#ifndef __ROMVARS_H
#define	__ROMVARS_H

#include "types.h"

struct boot_rom_vars {
	u8	baud_rate_code;
	u8	pad1[3];
	u32	uart_timeout;
	u8	uart_id;
	u8	pll_config;
	u16	cs_ws_config;
	u8	clktcxo_13mhz;
	u8	rhea_cntl;
	u16	chksum_cmd;
	u16	chksum_accum;
	u16	pad2;
	u32	branch_addr;
};

#endif	/* include guard */