| /* |
| * Copyright (c) 2013, The Regents of the University of California (Regents). |
| * All Rights Reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the Regents nor the |
| * names of its contributors may be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, |
| * SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING |
| * OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF REGENTS HAS |
| * BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED |
| * HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION TO PROVIDE |
| * MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
| */ |
| |
| #include <arch/barrier.h> |
| #include <arch/errno.h> |
| #include <atomic.h> |
| #include <commonlib/configstring.h> |
| #include <console/console.h> |
| #include <mcall.h> |
| #include <string.h> |
| #include <vm.h> |
| |
| int mcalldebug; // set this interactively for copious debug. |
| |
| uintptr_t mcall_query_memory(uintptr_t id, memory_block_info *info) |
| { |
| if (id == 0) { |
| uintptr_t base; |
| size_t size; |
| |
| query_mem(configstring(), &base, &size); |
| |
| mprv_write_ulong(&info->base, base); |
| mprv_write_ulong(&info->size, size); |
| return 0; |
| } |
| |
| return -1; |
| } |
| |
| uintptr_t mcall_send_ipi(uintptr_t recipient) |
| { |
| die("mcall_send_ipi is currently not implemented"); |
| return 0; |
| } |
| |
| uintptr_t mcall_clear_ipi(void) |
| { |
| // only clear SSIP if no other events are pending |
| if (HLS()->device_response_queue_head == NULL) { |
| clear_csr(mip, MIP_SSIP); |
| /* Ensure the other hart sees it. */ |
| mb(); |
| } |
| |
| return atomic_swap(&HLS()->ipi_pending, 0); |
| } |
| |
| uintptr_t mcall_shutdown(void) |
| { |
| die("mcall_shutdown is currently not implemented"); |
| return 0; |
| } |
| |
| uintptr_t mcall_set_timer(uint64_t when) |
| { |
| uint64_t *timecmp = HLS()->timecmp; |
| |
| if (mcalldebug) |
| printk(BIOS_SPEW, |
| "hart %d: HLS %p: mcall timecmp@%p to 0x%llx\n", |
| HLS()->hart_id, HLS(), timecmp, when); |
| *timecmp = when; |
| clear_csr(mip, MIP_STIP); |
| set_csr(mie, MIP_MTIP); |
| return 0; |
| } |
| |
| void hls_init(uint32_t hart_id) |
| { |
| printk(BIOS_SPEW, "hart %d: HLS is %p\n", hart_id, HLS()); |
| memset(HLS(), 0, sizeof(*HLS())); |
| HLS()->hart_id = hart_id; |
| |
| /* Initialize these pointers with dummy values, for now */ |
| HLS()->time = NULL; |
| HLS()->timecmp = NULL; |
| |
| printk(BIOS_SPEW, "Time is %p and timecmp is %p\n", |
| HLS()->time, HLS()->timecmp); |
| } |
| |
| uintptr_t mcall_console_putchar(uint8_t ch) |
| { |
| do_putchar(ch); |
| return 0; |
| } |