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o Grab the number of devices supported by PLIC from FDT.

Browse Source 
o Fix bug in PLIC_ENABLE macro when irq >= 32.

Tested on the real hardware, which is HiFive Unleashed board.

Thanks to SiFive, Inc. for the board provided.

Reviewed by:	markj
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D19775
This commit is contained in:
Ruslan Bukin 2019-04-02 12:02:35 +00:00
parent 95a1f0e81c
commit a8cb655d2e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=345796
1 changed files with 22 additions and 6 deletions
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28
sys/riscv/riscv/plic.c
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@ -52,9 +52,9 @@ __FBSDID("$FreeBSD$");
#include "pic_if.h"
#define PLIC_NIRQS 32
#define PLIC_MAX_IRQS 2048
#define PLIC_PRIORITY(n) (0x000000 + (n) * 0x4)
#define PLIC_ENABLE(n, h) (0x002000 + (h) * 0x80 + (n) / 32)
#define PLIC_ENABLE(n, h) (0x002000 + (h) * 0x80 + 4 * ((n) / 32))
#define PLIC_THRESHOLD(h) (0x200000 + (h) * 0x1000 + 0x0)
#define PLIC_CLAIM(h) (0x200000 + (h) * 0x1000 + 0x4)
@ -66,7 +66,8 @@ struct plic_irqsrc {
struct plic_softc {
device_t dev;
struct resource * intc_res;
struct plic_irqsrc isrcs[PLIC_NIRQS];
struct plic_irqsrc isrcs[PLIC_MAX_IRQS];
int ndev;
};
#define RD4(sc, reg) \
@ -158,7 +159,7 @@ plic_map_intr(device_t dev, struct intr_map_data *data,
return (ENOTSUP);
daf = (struct intr_map_data_fdt *)data;
if (daf->ncells != 1 || daf->cells[0] >= PLIC_NIRQS)
if (daf->ncells != 1 || daf->cells[0] > sc->ndev)
return (EINVAL);
*isrcp = &sc->isrcs[daf->cells[0]].isrc;
@ -189,6 +190,7 @@ plic_attach(device_t dev)
struct intr_pic *pic;
uint32_t irq;
const char *name;
phandle_t node;
phandle_t xref;
uint32_t cpu;
int error;
@ -198,6 +200,20 @@ plic_attach(device_t dev)
sc->dev = dev;
node = ofw_bus_get_node(dev);
if ((OF_getencprop(node, "riscv,ndev", &sc->ndev,
sizeof(sc->ndev))) < 0) {
device_printf(dev,
"Error: could not get number of devices\n");
return (ENXIO);
}
if (sc->ndev >= PLIC_MAX_IRQS) {
device_printf(dev,
"Error: invalid ndev (%d)\n", sc->ndev);
return (ENXIO);
}
/* Request memory resources */
rid = 0;
sc->intc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
@ -211,7 +227,7 @@ plic_attach(device_t dev)
isrcs = sc->isrcs;
name = device_get_nameunit(sc->dev);
cpu = PCPU_GET(cpuid);
for (irq = 0; irq < PLIC_NIRQS; irq++) {
for (irq = 1; irq <= sc->ndev; irq++) {
isrcs[irq].irq = irq;
error = intr_isrc_register(&isrcs[irq].isrc, sc->dev,
0, "%s,%u", name, irq);
@ -223,7 +239,7 @@ plic_attach(device_t dev)
}
WR4(sc, PLIC_THRESHOLD(cpu), 0);
xref = OF_xref_from_node(ofw_bus_get_node(sc->dev));
xref = OF_xref_from_node(node);
pic = intr_pic_register(sc->dev, xref);
if (pic == NULL)
return (ENXIO);