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Add system for memory mapping a block of memory from the host.

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Toby Jaffey 2025-12-11 02:36:46 +00:00
parent 8802b4c268
commit b55c2bc88a
9 changed files with 253 additions and 1 deletions
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13
test/extram/rom/Makefile Normal file
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TOPDIR=../../../
PROJECT:=$(shell basename ${PWD})
SRCS=${PROJECT}.c ${TOPDIR}/apps/crt0.S
all: all_common
@# Convert ROM to C file and header
@xxd -i ${PROJECT}.bin > ${PROJECT}-header.c
@echo "extern unsigned char ${PROJECT}_bin[]; extern int ${PROJECT}_bin_len;" > ${PROJECT}-header.h
test: test_common
clean: clean_common
rm -f ${PROJECT}-header.h ${PROJECT}-header.c
include ${TOPDIR}/apps/makefile.common

31
test/extram/rom/rom.c Normal file
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#include "uvm32_target.h"
#include "../shared.h"
void main(void) {
switch(syscall(SYSCALL_PICKTEST, 0, 0)) {
case TEST1: {
uint32_t *p = (uint32_t *)UVM32_EXTRAM_BASE;
// read memory and print via syscall
printdec(*p);
// modify memory
*p = *p * 2;
} break;
case TEST2: {
uint32_t *p = (uint32_t *)UVM32_EXTRAM_BASE;
printdec(p[32]); // past the end
} break;
case TEST3: {
uint32_t *p = (uint32_t *)UVM32_EXTRAM_BASE;
p[32] = 1234; // past the end
} break;
case TEST4: {
uint32_t *p = (uint32_t *)UVM32_EXTRAM_BASE;
p[0] = 1234; // good write
yield(0);
} break;
}
}