From 6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 18:29:51 +0200
Subject: Adding upstream version 2.06.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 grub-core/lib/ieee1275/relocator.c | 114 +++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 grub-core/lib/ieee1275/relocator.c

(limited to 'grub-core/lib/ieee1275/relocator.c')

diff --git a/grub-core/lib/ieee1275/relocator.c b/grub-core/lib/ieee1275/relocator.c
new file mode 100644
index 0000000..c6dd8fa
--- /dev/null
+++ b/grub-core/lib/ieee1275/relocator.c
@@ -0,0 +1,114 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2010  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/relocator.h>
+#include <grub/relocator_private.h>
+#include <grub/memory.h>
+#include <grub/ieee1275/ieee1275.h>
+
+/* Helper for grub_relocator_firmware_get_max_events.  */
+static int
+count (grub_uint64_t addr __attribute__ ((unused)),
+       grub_uint64_t len __attribute__ ((unused)),
+       grub_memory_type_t type __attribute__ ((unused)), void *data)
+{
+  int *counter = data;
+
+  (*counter)++;
+  return 0;
+}
+
+unsigned 
+grub_relocator_firmware_get_max_events (void)
+{
+  int counter = 0;
+
+  if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_FORCE_CLAIM))
+    return 0;
+  grub_machine_mmap_iterate (count, &counter);
+  return 2 * counter;
+}
+
+/* Context for grub_relocator_firmware_fill_events.  */
+struct grub_relocator_firmware_fill_events_ctx
+{
+  struct grub_relocator_mmap_event *events;
+  int counter;
+};
+
+/* Helper for grub_relocator_firmware_fill_events.  */
+static int
+grub_relocator_firmware_fill_events_iter (grub_uint64_t addr,
+					  grub_uint64_t len,
+					  grub_memory_type_t type, void *data)
+{
+  struct grub_relocator_firmware_fill_events_ctx *ctx = data;
+
+  if (type != GRUB_MEMORY_AVAILABLE)
+    return 0;
+
+  if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_NO_PRE1_5M_CLAIM))
+    {
+      if (addr + len <= 0x180000)
+	return 0;
+
+      if (addr < 0x180000)
+	{
+	  len = addr + len - 0x180000;
+	  addr = 0x180000;
+	}
+    }
+
+  ctx->events[ctx->counter].type = REG_FIRMWARE_START;
+  ctx->events[ctx->counter].pos = addr;
+  ctx->counter++;
+  ctx->events[ctx->counter].type = REG_FIRMWARE_END;
+  ctx->events[ctx->counter].pos = addr + len;
+  ctx->counter++;
+
+  return 0;
+}
+
+unsigned 
+grub_relocator_firmware_fill_events (struct grub_relocator_mmap_event *events)
+{
+  struct grub_relocator_firmware_fill_events_ctx ctx = {
+    .events = events,
+    .counter = 0
+  };
+
+  if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_FORCE_CLAIM))
+    return 0;
+  grub_machine_mmap_iterate (grub_relocator_firmware_fill_events_iter, &ctx);
+  return ctx.counter;
+}
+
+int
+grub_relocator_firmware_alloc_region (grub_addr_t start, grub_size_t size)
+{
+  grub_err_t err;
+  err = grub_claimmap (start, size);
+  grub_errno = 0;
+  return (err == 0);
+}
+
+void
+grub_relocator_firmware_free_region (grub_addr_t start, grub_size_t size)
+{
+  grub_ieee1275_release (start, size);
+}
-- 
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