Date: Thu, 1 Oct 2020 15:04:55 +0000 (UTC) From: Kristof Provost <kp@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r366315 - in head/sys/riscv: include riscv Message-ID: <202010011504.091F4tRU073829@repo.freebsd.org>
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Author: kp Date: Thu Oct 1 15:04:55 2020 New Revision: 366315 URL: https://svnweb.freebsd.org/changeset/base/366315 Log: riscv: Add memmmap so we can mmap /dev/mem Reviewed by: mhorne Sponsored by: Axiado Differential Revision: https://reviews.freebsd.org/D26622 Modified: head/sys/riscv/include/memdev.h head/sys/riscv/riscv/mem.c Modified: head/sys/riscv/include/memdev.h ============================================================================== --- head/sys/riscv/include/memdev.h Thu Oct 1 14:20:36 2020 (r366314) +++ head/sys/riscv/include/memdev.h Thu Oct 1 15:04:55 2020 (r366315) @@ -35,6 +35,6 @@ d_open_t memopen; d_read_t memrw; d_ioctl_t memioctl_md; -#define memmmap (d_mmap_t *)NULL +d_mmap_t memmmap; #endif /* _MACHINE_MEMDEV_H_ */ Modified: head/sys/riscv/riscv/mem.c ============================================================================== --- head/sys/riscv/riscv/mem.c Thu Oct 1 14:20:36 2020 (r366314) +++ head/sys/riscv/riscv/mem.c Thu Oct 1 15:04:55 2020 (r366315) @@ -122,6 +122,21 @@ memrw(struct cdev *dev, struct uio *uio, int flags) return (error); } +/* + * Allow user processes to MMAP some memory sections + * instead of going through read/write. + */ +int +memmmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr, + int prot __unused, vm_memattr_t *memattr __unused) +{ + if (dev2unit(dev) == CDEV_MINOR_MEM) { + *paddr = offset; + return (0); + } + return (-1); +} + int memioctl_md(struct cdev *dev __unused, u_long cmd __unused, caddr_t data __unused, int flags __unused, struct thread *td __unused)
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