diff options
| -rw-r--r-- | sys/firmware/acpi/acpi_init.c | 114 | ||||
| -rw-r--r-- | sys/include/firmware/acpi/acpi.h | 39 | ||||
| -rw-r--r-- | sys/include/firmware/acpi/tables.h | 76 | ||||
| -rw-r--r-- | sys/kern/init_main.c | 3 |
4 files changed, 232 insertions, 0 deletions
diff --git a/sys/firmware/acpi/acpi_init.c b/sys/firmware/acpi/acpi_init.c new file mode 100644 index 0000000..fd23ada --- /dev/null +++ b/sys/firmware/acpi/acpi_init.c @@ -0,0 +1,114 @@ +/* + * Copyright (c) 2023 Ian Marco Moffett and the VegaOS team. + * 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 VegaOS nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +/* $Id$ */ + +#include <firmware/acpi/acpi.h> +#include <firmware/acpi/tables.h> +#include <sys/limine.h> +#include <sys/syslog.h> +#include <sys/cdefs.h> +#include <sys/panic.h> +#include <sys/syslog.h> +#include <vm/vm.h> + +__MODULE_NAME("acpi"); +__KERNEL_META("$Vega$: acpi_init.c, Ian Macro Moffett, " + "ACPI init logic"); + +static volatile struct limine_rsdp_request rsdp_req = { + .id = LIMINE_RSDP_REQUEST, + .revision = 0 +}; + +static size_t root_sdt_entries = 0; +static bool using_xsdt = false; +static struct acpi_root_sdt *root_sdt = NULL; + +/* + * Writes out OEMID of ACPI header. + * + * @type: Type of structure (e.g RSDP) + * @hdr: Header of structure. + */ +static void +acpi_print_oemid(const char *type, char oemid[OEMID_SIZE]) +{ + if (type != NULL) { + KINFO("%s OEMID: ", type); + } + + for (size_t i = 0; i < OEMID_SIZE; ++i) { + kprintf("%c", oemid[i]); + } + kprintf("\n"); +} + +static bool +acpi_is_checksum_valid(struct acpi_header *hdr) +{ + uint8_t sum; + + sum = 0; + for (int i = 0; i < hdr->length; ++i) { + sum += ((char *)hdr)[i]; + } + + /* Sum of table (from header to end) must be zero!! */ + return sum == 0; +} + +void +acpi_init(void) +{ + struct acpi_rsdp *rsdp; + + /* Can't do anything if we have no response! */ + if (rsdp_req.response == NULL) { + panic("RSDP request has no response affiliated...\n"); + } + + /* Fetch the RSDP */ + rsdp = rsdp_req.response->address; + acpi_print_oemid("RSDP", rsdp->oemid); + + /* Fetch the RSDT/XSDT */ + if (rsdp->revision >= 2) { + using_xsdt = true; + root_sdt = PHYS_TO_VIRT(rsdp->xsdt_addr); + KINFO("Using XSDT as root SDT\n"); + } else { + root_sdt = PHYS_TO_VIRT(rsdp->rsdt_addr); + KINFO("Using RSDT as root SDT\n"); + } + if (!acpi_is_checksum_valid(&root_sdt->hdr)) { + panic("Root SDT has an invalid checksum!\n"); + } + root_sdt_entries = (root_sdt->hdr.length - sizeof(root_sdt->hdr)) / 4; +} diff --git a/sys/include/firmware/acpi/acpi.h b/sys/include/firmware/acpi/acpi.h new file mode 100644 index 0000000..65e39a4 --- /dev/null +++ b/sys/include/firmware/acpi/acpi.h @@ -0,0 +1,39 @@ +/* + * Copyright (c) 2023 Ian Marco Moffett and the VegaOS team. + * 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 VegaOS nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +/* $Id$ */ + +#ifndef _ACPI_ACPI_H_ +#define _ACPI_ACPI_H_ + +#include <sys/types.h> + +void acpi_init(void); + +#endif /* !_ACPI_ACPI_H_ */ diff --git a/sys/include/firmware/acpi/tables.h b/sys/include/firmware/acpi/tables.h new file mode 100644 index 0000000..a504bef --- /dev/null +++ b/sys/include/firmware/acpi/tables.h @@ -0,0 +1,76 @@ +/* + * Copyright (c) 2023 Ian Marco Moffett and the VegaOS team. + * 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 VegaOS nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +/* $Id$ */ + +#ifndef _ACPI_TABLES_H_ +#define _ACPI_TABLES_H_ + +#include <sys/types.h> +#include <sys/cdefs.h> + +#define OEMID_SIZE 6 + +struct __packed acpi_header { + uint32_t signature; /* ASCII signature string */ + uint32_t length; /* Length of table in bytes */ + uint8_t revision; /* Revision of the structure */ + uint8_t checksum; /* Checksum of the header */ + char oemid[OEMID_SIZE]; /* OEM-supplied string that IDs the OEM */ + char oem_table_id[8]; /* OEM-supplied string (used by OEM) */ + uint32_t oem_revision; /* OEM-supplied revision number */ + uint32_t creator_id; /* Vendor ID of creator utility */ + uint32_t creator_revision; /* Revision of creator utility */ +}; + +struct __packed acpi_rsdp { + uint64_t signature; /* RSD PTR */ + uint8_t checksum; /* Structure checksum */ + char oemid[OEMID_SIZE]; /* OEM-supplied string that IDs the OEM */ + uint8_t revision; /* Revision of the structure */ + uint32_t rsdt_addr; /* RSDT physical address */ + + /* Reserved if revision < 2 */ + uint32_t length; /* Length of table in bytes */ + uint64_t xsdt_addr; /* XSDT physical address */ + uint8_t ext_checksum; /* Extended checksum */ + uint8_t reserved[3]; +}; + +/* + * XSDT or RSDT depending + * on what revision the header + * says. + */ +struct __packed acpi_root_sdt { + struct acpi_header hdr; + void *entries; /* 8*n */ +}; + +#endif /* !_ACPI_TABLES_H_ */ diff --git a/sys/kern/init_main.c b/sys/kern/init_main.c index 6fbc48c..b3a1e8b 100644 --- a/sys/kern/init_main.c +++ b/sys/kern/init_main.c @@ -33,6 +33,7 @@ #include <sys/tty.h> #include <sys/syslog.h> #include <sys/machdep.h> +#include <firmware/acpi/acpi.h> #include <vm/vm_physseg.h> #include <logo.h> @@ -56,6 +57,8 @@ main(void) processor_init(&bsp); vm_physseg_init(); + acpi_init(); + /* We're done here, halt the processor */ __ASMV("cli; hlt"); } |