1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
60  * It is allocated in page-multiple blocks on a first-come first-serve basis,
63 static char *romptr;	/* Pointer to userspace-mapped bootrom region. */
64 static vm_paddr_t gpa_base;	/* GPA of low end of region. */
65 static vm_paddr_t gpa_allocbot;	/* Low GPA of free region. */
66 static vm_paddr_t gpa_alloctop;	/* High GPA, minus 1, of free region. */
68 #define CFI_BCS_WRITE_BYTE      0x10
69 #define CFI_BCS_CLEAR_STATUS    0x50
70 #define CFI_BCS_READ_STATUS     0x70
71 #define CFI_BCS_READ_ARRAY      0xff
75 	uint64_t	gpa;  member
78 } var = { NULL, 0, 0, CFI_BCS_READ_ARRAY };
90 	offset = addr - var.gpa;  in bootrom_var_mem_handler()
91 	if (offset + size > var.size || offset < 0 || offset + size <= offset)  in bootrom_var_mem_handler()
107 			memset(val, 0, size);  in bootrom_var_mem_handler()
115 	return (0);  in bootrom_var_mem_handler()
127 	gpa_base = highmem - BOOTROM_SIZE;  in init_bootrom()
129 	gpa_alloctop = highmem - 1;  in init_bootrom()
138 	vm_paddr_t gpa;  in bootrom_alloc()  local
152 	if (len == 0 || len > BOOTROM_SIZE) {  in bootrom_alloc()
163 		gpa = (gpa_alloctop - len) + 1;  in bootrom_alloc()
164 		if (gpa < gpa_allocbot) {  in bootrom_alloc()
169 		gpa = gpa_allocbot;  in bootrom_alloc()
170 		if (gpa > (gpa_alloctop - len) + 1) {  in bootrom_alloc()
176 	segoff = gpa - gpa_base;  in bootrom_alloc()
177 	if (vm_mmap_memseg(ctx, gpa, VM_BOOTROM, segoff, len, prot) != 0) {  in bootrom_alloc()
184 		gpa_alloctop = gpa - 1;  in bootrom_alloc()
186 		gpa_allocbot = gpa + len;  in bootrom_alloc()
190 		*gpa_out = gpa;  in bootrom_alloc()
191 	return (0);  in bootrom_alloc()
204 	rv = -1;  in bootrom_loadrom()
205 	varfd = -1;  in bootrom_loadrom()
209 		return (0);  in bootrom_loadrom()
220 		return (-1);  in bootrom_loadrom()
224 	if (fd < 0) {  in bootrom_loadrom()
230 	if (fstat(fd, &sbuf) < 0) {  in bootrom_loadrom()
239 	var_size = 0;  in bootrom_loadrom()
242 		if (varfd < 0) {  in bootrom_loadrom()
248 		if (fstat(varfd, &sbuf) < 0) {  in bootrom_loadrom()
259 	    (var_size != 0 && var_size < PAGE_SIZE)) {  in bootrom_loadrom()
275 	    BOOTROM_ALLOC_TOP, &ptr, NULL) != 0) {  in bootrom_loadrom()
280 	for (i = 0; i < rom_size / PAGE_SIZE; i++) {  in bootrom_loadrom()
289 	if (varfd >= 0) {  in bootrom_loadrom()
291 		    MAP_SHARED, varfd, 0);  in bootrom_loadrom()
295 		var.gpa = (gpa_alloctop - var_size) + 1;  in bootrom_loadrom()
296 		gpa_alloctop = var.gpa - 1;  in bootrom_loadrom()
301 		    .base = var.gpa,  in bootrom_loadrom()
304 		if (rv != 0)  in bootrom_loadrom()
308 	rv = 0;  in bootrom_loadrom()
310 	if (varfd >= 0)  in bootrom_loadrom()
312 	if (fd >= 0)  in bootrom_loadrom()