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authorJonathan Neuschäfer <j.neuschaefer@gmx.net>2016-10-28 00:25:02 +0200
committerRonald G. Minnich <rminnich@gmail.com>2016-11-07 16:47:49 +0100
commit99f2f113ec397dd042dcaa23c47123f3def19ebc (patch)
tree38b8eb7e1ad90c2d5e2b2bb6ed32ddca99016214 /src/arch/riscv/mcall.c
parent7ca9b8ae5014a745855296903682ae803235cb35 (diff)
downloadcoreboot-99f2f113ec397dd042dcaa23c47123f3def19ebc.tar.xz
riscv: Unify SBI call implementations under arch/riscv/
Note that currently, traps are only handled by the trap handler installed in the bootblock. The romstage and ramstage don't override it. TEST=Booted emulation/spike-qemu and lowrisc/nexys4ddr with a linux payload. It worked as much as before (Linux didn't boot, but it made some successful SBI calls) Change-Id: Icce96ab3f41ae0f34bd86e30f9ff17c30317854e Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/17057 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/arch/riscv/mcall.c')
-rw-r--r--src/arch/riscv/mcall.c101
1 files changed, 101 insertions, 0 deletions
diff --git a/src/arch/riscv/mcall.c b/src/arch/riscv/mcall.c
new file mode 100644
index 0000000000..fdc02bef2b
--- /dev/null
+++ b/src/arch/riscv/mcall.c
@@ -0,0 +1,101 @@
+/*
+ * 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 <console/console.h>
+#include <mcall.h>
+#include <string.h>
+#include <vm.h>
+
+uintptr_t mcall_query_memory(uintptr_t id, memory_block_info *info)
+{
+ if (id == 0) {
+ mprv_write_ulong(&info->base, 2U*GiB);
+
+ /* TODO: Return the correct value */
+ mprv_write_ulong(&info->size, 1*GiB);
+ 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(unsigned long long when)
+{
+ printk(BIOS_DEBUG, "mcall_set_timer is currently not implemented, ignoring\n");
+ return 0;
+}
+
+uintptr_t mcall_dev_req(sbi_device_message *m)
+{
+ die("mcall_dev_req is currently not implemented");
+ return 0;
+}
+
+uintptr_t mcall_dev_resp(void)
+{
+ die("mcall_dev_resp is currently not implemented");
+ return 0;
+}
+
+void hls_init(uint32_t hart_id)
+{
+ memset(HLS(), 0, sizeof(*HLS()));
+ HLS()->hart_id = hart_id;
+}
+
+uintptr_t mcall_console_putchar(uint8_t ch)
+{
+ do_putchar(ch);
+ return 0;
+}