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hw/arm/mps2-tz: Support ROMs as well as RAMs 

The AN505 and AN521 don't have any read-only memory, but the AN524
does; add a flag to ROMInfo to mark a region as ROM.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210215115138.20465-19-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2021-02-15 11:51:32 +00:00
parent 18a8c3b390
commit b89918fceb
1 changed files with 6 additions and 0 deletions
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6
hw/arm/mps2-tz.c
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@ -92,8 +92,10 @@ typedef struct RAMInfo {
* Flag values:
* IS_ALIAS: this RAM area is an alias to the upstream end of the
* MPC specified by its .mpc value
* IS_ROM: this RAM area is read-only
*/
#define IS_ALIAS 1
#define IS_ROM 2
struct MPS2TZMachineClass {
MachineClass parent;
@ -209,6 +211,7 @@ static MemoryRegion *mr_for_raminfo(MPS2TZMachineState *mms,
if (raminfo->mrindex < 0) {
/* Means this RAMInfo is for QEMU's "system memory" */
MachineState *machine = MACHINE(mms);
assert(!(raminfo->flags & IS_ROM));
return machine->ram;
}
@ -217,6 +220,9 @@ static MemoryRegion *mr_for_raminfo(MPS2TZMachineState *mms,
memory_region_init_ram(ram, NULL, raminfo->name,
raminfo->size, &error_fatal);
if (raminfo->flags & IS_ROM) {
memory_region_set_readonly(ram, true);
}
return ram;
}