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// Copyright (C) 2024 Clyne Sullivan <clyne@bitgloo.com>
//
// Distributed under the GNU GPL v3 or later. You should have received a copy of
// the GNU General Public License along with this program.
// If not, see <https://www.gnu.org/licenses/>.
extern const init_vector_table: [2]u32;
const vector_table_type = [128] *const fn () void; // up to 256
var vector_table: vector_table_type align(256) = undefined;
var vtor: **volatile vector_table_type = @ptrFromInt(0xE000ED08);
pub const vector = enum(u7) {
NMI = 2,
HardFault,
MemManage,
BusFault,
UsageFault,
rsvd7,
rsvd8,
rsvd9,
rsvd10,
SVCall,
DebugMonitor,
rsvd13,
PendSV,
SysTick,
};
pub fn initialize() void {
vector_table[0] = @ptrFromInt(init_vector_table[0]);
vector_table[1] = @ptrFromInt(init_vector_table[1]);
register(.NMI, nmi);
register(.HardFault, hardfault);
register(.MemManage, memmanage);
register(.BusFault, busfault);
register(.UsageFault, usagefault);
vtor.* = &vector_table;
}
pub fn register(index: vector, handler: *const fn () void) void {
vector_table[@intFromEnum(index)] = handler;
}
fn nmi() void { while (true) {} }
fn hardfault() void { while (true) {} }
fn memmanage() void { while (true) {} }
fn busfault() void { while (true) {} }
fn usagefault() void { while (true) {} }
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