Setup project skeleton

5 files changed, 184 insertions, 0 deletions

diff --git a/src/drv/ps1/rcnt/CMakeLists.txt b/src/drv/ps1/rcnt/CMakeLists.txt
new file mode 100644
index 0000000..f5b5171
--- /dev/null
+++ b/src/drv/ps1/rcnt/CMakeLists.txt
@@ -0,0 +1,22 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+add_library(drv_ps1_rcnt)
+add_subdirectory(src)
+target_include_directories(drv_ps1_rcnt PUBLIC include PRIVATE private_include)
+target_link_libraries(drv_ps1_rcnt
+    PUBLIC c
+    PRIVATE drv_ps1_bios drv_ps1_irq drv_ps1_event)
diff --git a/src/drv/ps1/rcnt/include/drv/ps1/rcnt.h b/src/drv/ps1/rcnt/include/drv/ps1/rcnt.h
new file mode 100644
index 0000000..831012c
--- /dev/null
+++ b/src/drv/ps1/rcnt/include/drv/ps1/rcnt.h
@@ -0,0 +1,45 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_RCNT_H
+#define DRV_PS1_RCNT_H
+
+#include <stdint.h>
+
+union drv_ps1_rcnt_cfg
+{
+    struct
+    {
+        uint32_t sync_enable :1, sync_mode :2, reset :1, irq_tgt :1,
+            irq_max :1, repeat :1, pulse_toggle :1, clocksrc :2, intreq :1;
+    } bits;
+
+    uint32_t word;
+};
+
+enum drv_ps1_rcnt
+{
+    DRV_PS1_RCNT0,
+    DRV_PS1_RCNT1,
+    DRV_PS1_RCNT2
+};
+
+int drv_ps1_rcnt_init(enum drv_ps1_rcnt rcnt, uint16_t target,
+    const union drv_ps1_rcnt_cfg *cfg, int (*f)(void));
+
+#endif
diff --git a/src/drv/ps1/rcnt/private_include/drv/ps1/rcnt/regs.h b/src/drv/ps1/rcnt/private_include/drv/ps1/rcnt/regs.h
new file mode 100644
index 0000000..a6c9750
--- /dev/null
+++ b/src/drv/ps1/rcnt/private_include/drv/ps1/rcnt/regs.h
@@ -0,0 +1,36 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DRV_PS1_RCNT_REGS_H
+#define DRV_PS1_RCNT_REGS_H
+
+#include <drv/ps1/rcnt.h>
+#include <stdint.h>
+
+struct rcnt_value
+{
+    uint32_t value :16, :16;
+};
+
+#define RCNT_BASE(n) (0x1f801100 + (n << 4))
+#define RCNT_REG(n, m) (RCNT_BASE(n) + m)
+#define RCNT_VALUE(n) ((volatile struct rcnt_value *)RCNT_REG(n, 0))
+#define RCNT_MODE(n) ((volatile union drv_ps1_rcnt_cfg *)RCNT_REG(n, 4))
+#define RCNT_TARGET(n) ((volatile struct rcnt_value *)RCNT_REG(n, 8))
+
+#endif
diff --git a/src/drv/ps1/rcnt/src/CMakeLists.txt b/src/drv/ps1/rcnt/src/CMakeLists.txt
new file mode 100644
index 0000000..4e8eb88
--- /dev/null
+++ b/src/drv/ps1/rcnt/src/CMakeLists.txt
@@ -0,0 +1,19 @@
+# wnix, a Unix-like operating system for WebAssembly applications.
+# Copyright (C) 2025  Xavier Del Campo Romero
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+target_sources(drv_ps1_rcnt PRIVATE
+    init.c
+)
diff --git a/src/drv/ps1/rcnt/src/init.c b/src/drv/ps1/rcnt/src/init.c
new file mode 100644
index 0000000..0c4327c
--- /dev/null
+++ b/src/drv/ps1/rcnt/src/init.c
@@ -0,0 +1,62 @@
+/*
+ * wnix, a Unix-like operating system for WebAssembly applications.
+ * Copyright (C) 2025  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <drv/ps1/rcnt.h>
+#include <drv/ps1/rcnt/regs.h>
+#include <drv/ps1/event.h>
+#include <drv/ps1/irq.h>
+#include <drv/ps1/bios.h>
+#include <stddef.h>
+#include <stdint.h>
+
+int drv_ps1_rcnt_init(const enum drv_ps1_rcnt rcnt, const uint16_t target,
+    const union drv_ps1_rcnt_cfg *const cfg, int (*const f)(void))
+{
+    int class;
+
+    EnterCriticalSection();
+    RCNT_TARGET(rcnt)->value = target;
+    *RCNT_MODE(rcnt) = *cfg;
+
+    switch (rcnt)
+    {
+        case DRV_PS1_RCNT0:
+            I_MASK->bits.tmr0 = 1;
+            class = CLASS_RTC0;
+            break;
+        case DRV_PS1_RCNT1:
+            I_MASK->bits.tmr1 = 1;
+            class = CLASS_RTC1;
+            break;
+        case DRV_PS1_RCNT2:
+            I_MASK->bits.tmr2 = 1;
+            class = CLASS_RTC2;
+            break;
+    }
+
+    ExitCriticalSection();
+
+    const int event = drv_ps1_event_open(class, SPEC_INTERRUPTED,
+        MODE_EXECUTE, f);
+
+    if (event == -1)
+        return -1;
+
+    drv_ps1_event_enable(event);
+    return 0;
+}