diff options
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/boot/efi/loader/arch/amd64/elf64_freebsd.c | 17 | ||||
| -rw-r--r-- | sys/boot/i386/libi386/biosacpi.c | 17 | ||||
| -rw-r--r-- | sys/x86/acpica/OsdEnvironment.c | 11 |
3 files changed, 44 insertions, 1 deletions
diff --git a/sys/boot/efi/loader/arch/amd64/elf64_freebsd.c b/sys/boot/efi/loader/arch/amd64/elf64_freebsd.c index 1b95cdede4b5..a1096d9a650b 100644 --- a/sys/boot/efi/loader/arch/amd64/elf64_freebsd.c +++ b/sys/boot/efi/loader/arch/amd64/elf64_freebsd.c @@ -101,6 +101,17 @@ elf64_exec(struct preloaded_file *fp) char buf[24]; int revision; + /* + * Report the RSDP to the kernel. While this can be found with + * a BIOS boot, the RSDP may be elsewhere when booted from UEFI. + * The old code used the 'hints' method to communite this to + * the kernel. However, while convenient, the 'hints' method + * is fragile and does not work when static hints are compiled + * into the kernel. Instead, move to setting different tunables + * that start with acpi. The old 'hints' can be removed before + * we branch for FreeBSD 12. + */ + rsdp = efi_get_table(&acpi20_guid); if (rsdp == NULL) { rsdp = efi_get_table(&acpi_guid); @@ -108,23 +119,29 @@ elf64_exec(struct preloaded_file *fp) if (rsdp != NULL) { sprintf(buf, "0x%016llx", (unsigned long long)rsdp); setenv("hint.acpi.0.rsdp", buf, 1); + setenv("acpi.rsdp", buf, 1); revision = rsdp->Revision; if (revision == 0) revision = 1; sprintf(buf, "%d", revision); setenv("hint.acpi.0.revision", buf, 1); + setenv("acpi.revision", buf, 1); strncpy(buf, rsdp->OemId, sizeof(rsdp->OemId)); buf[sizeof(rsdp->OemId)] = '\0'; setenv("hint.acpi.0.oem", buf, 1); + setenv("acpi.oem", buf, 1); sprintf(buf, "0x%016x", rsdp->RsdtPhysicalAddress); setenv("hint.acpi.0.rsdt", buf, 1); + setenv("acpi.rsdt", buf, 1); if (revision >= 2) { /* XXX extended checksum? */ sprintf(buf, "0x%016llx", (unsigned long long)rsdp->XsdtPhysicalAddress); setenv("hint.acpi.0.xsdt", buf, 1); + setenv("acpi.xsdt", buf, 1); sprintf(buf, "%d", rsdp->Length); setenv("hint.acpi.0.xsdt_length", buf, 1); + setenv("acpi.xsdt_length", buf, 1); } } diff --git a/sys/boot/i386/libi386/biosacpi.c b/sys/boot/i386/libi386/biosacpi.c index bedc722e850d..8167fca7b622 100644 --- a/sys/boot/i386/libi386/biosacpi.c +++ b/sys/boot/i386/libi386/biosacpi.c @@ -60,25 +60,40 @@ biosacpi_detect(void) if ((rsdp = biosacpi_find_rsdp()) == NULL) return; - /* export values from the RSDP */ + /* + * Report the RSDP to the kernel. While this can be found with + * a BIOS boot, the RSDP may be elsewhere when booted from UEFI. + * The old code used the 'hints' method to communite this to + * the kernel. However, while convenient, the 'hints' method + * is fragile and does not work when static hints are compiled + * into the kernel. Instead, move to setting different tunables + * that start with acpi. The old 'hints' can be removed before + * we branch for FreeBSD 12. + */ sprintf(buf, "0x%08x", VTOP(rsdp)); setenv("hint.acpi.0.rsdp", buf, 1); + setenv("acpi.rsdp", buf, 1); revision = rsdp->Revision; if (revision == 0) revision = 1; sprintf(buf, "%d", revision); setenv("hint.acpi.0.revision", buf, 1); + setenv("acpi.revision", buf, 1); strncpy(buf, rsdp->OemId, sizeof(rsdp->OemId)); buf[sizeof(rsdp->OemId)] = '\0'; setenv("hint.acpi.0.oem", buf, 1); + setenv("acpi.oem", buf, 1); sprintf(buf, "0x%08x", rsdp->RsdtPhysicalAddress); setenv("hint.acpi.0.rsdt", buf, 1); + setenv("acpi.rsdt", buf, 1); if (revision >= 2) { /* XXX extended checksum? */ sprintf(buf, "0x%016llx", rsdp->XsdtPhysicalAddress); setenv("hint.acpi.0.xsdt", buf, 1); + setenv("acpi.xsdt", buf, 1); sprintf(buf, "%d", rsdp->Length); setenv("hint.acpi.0.xsdt_length", buf, 1); + setenv("acpi.xsdt_length", buf, 1); } } diff --git a/sys/x86/acpica/OsdEnvironment.c b/sys/x86/acpica/OsdEnvironment.c index be612b5335aa..ab8a7fbaacc0 100644 --- a/sys/x86/acpica/OsdEnvironment.c +++ b/sys/x86/acpica/OsdEnvironment.c @@ -30,6 +30,7 @@ __FBSDID("$FreeBSD$"); #include <sys/types.h> #include <sys/bus.h> +#include <sys/kernel.h> #include <sys/sysctl.h> #include <contrib/dev/acpica/include/acpi.h> @@ -59,6 +60,16 @@ acpi_get_root_from_loader(void) { long acpi_root; + if (TUNABLE_ULONG_FETCH("acpi.rsdp", &acpi_root)) + return (acpi_root); + + /* + * The hints mechanism is unreliable (it fails if anybody ever + * compiled in hints to the kernel). It has been replaced + * by the tunable method, but is used here as a fallback to + * retain maximum compatibility between old loaders and new + * kernels. It can be removed after 11.0R. + */ if (resource_long_value("acpi", 0, "rsdp", &acpi_root) == 0) return (acpi_root); |