a5fd0d184a
The init infrastructure, found in `init.h`, is currently used by:
- `SYS_INIT`: to call functions before `main`
- `DEVICE_*`: to initialize devices
They are all sorted according to an initialization level + a priority.
`SYS_INIT` calls are really orthogonal to devices, however, the required
function signature requires a `const struct device *dev` as a first
argument. The only reason for that is because the same init machinery is
used by devices, so we have something like:
```c
struct init_entry {
int (*init)(const struct device *dev);
/* only set by DEVICE_*, otherwise NULL */
const struct device *dev;
}
```
As a result, we end up with such weird/ugly pattern:
```c
static int my_init(const struct device *dev)
{
/* always NULL! add ARG_UNUSED to avoid compiler warning */
ARG_UNUSED(dev);
...
}
```
This is really a result of poor internals isolation. This patch proposes
a to make init entries more flexible so that they can accept sytem
initialization calls like this:
```c
static int my_init(void)
{
...
}
```
This is achieved using a union:
```c
union init_function {
/* for SYS_INIT, used when init_entry.dev == NULL */
int (*sys)(void);
/* for DEVICE*, used when init_entry.dev != NULL */
int (*dev)(const struct device *dev);
};
struct init_entry {
/* stores init function (either for SYS_INIT or DEVICE*)
union init_function init_fn;
/* stores device pointer for DEVICE*, NULL for SYS_INIT. Allows
* to know which union entry to call.
*/
const struct device *dev;
}
```
This solution **does not increase ROM usage**, and allows to offer clean
public APIs for both SYS_INIT and DEVICE*. Note that however, init
machinery keeps a coupling with devices.
**NOTE**: This is a breaking change! All `SYS_INIT` functions will need
to be converted to the new signature. See the script offered in the
following commit.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
init: convert SYS_INIT functions to the new signature
Conversion scripted using scripts/utils/migrate_sys_init.py.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
manifest: update projects for SYS_INIT changes
Update modules with updated SYS_INIT calls:
- hal_ti
- lvgl
- sof
- TraceRecorderSource
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
tests: devicetree: devices: adjust test
Adjust test according to the recently introduced SYS_INIT
infrastructure.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
tests: kernel: threads: adjust SYS_INIT call
Adjust to the new signature: int (*init_fn)(void);
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
/*
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* Copyright (c) 2019-2020 Cobham Gaisler AB
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/*
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* This is a driver for the GRLIB IRQMP interrupt controller common in LEON
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* systems.
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*
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* Interrupt level 1..15 are SPARC interrupts. Interrupt level 16..31, if
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* implemented in the interrupt controller, are IRQMP "extended interrupts".
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*
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* For more information about IRQMP, see the GRLIB IP Core User's Manual.
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*/
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#define DT_DRV_COMPAT gaisler_irqmp
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#include <zephyr/kernel.h>
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#include <zephyr/init.h>
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/*
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* Register description for IRQMP and IRQAMP interrupt controllers
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* IRQMP - Multiprocessor Interrupt Controller
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* IRQ(A)MP - Multiprocessor Interrupt Controller with extended ASMP support
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*/
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#define IRQMP_NCPU_MAX 16
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struct irqmp_regs {
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uint32_t ilevel; /* 0x00 */
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uint32_t ipend; /* 0x04 */
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uint32_t iforce0; /* 0x08 */
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uint32_t iclear; /* 0x0c */
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uint32_t mpstat; /* 0x10 */
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uint32_t brdlst; /* 0x14 */
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uint32_t errstat; /* 0x18 */
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uint32_t wdogctrl; /* 0x1c */
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uint32_t asmpctrl; /* 0x20 */
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uint32_t icselr[2]; /* 0x24 */
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uint32_t reserved2c; /* 0x2c */
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uint32_t reserved30; /* 0x30 */
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uint32_t reserved34; /* 0x34 */
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uint32_t reserved38; /* 0x38 */
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uint32_t reserved3c; /* 0x3c */
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uint32_t pimask[IRQMP_NCPU_MAX]; /* 0x40 */
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uint32_t piforce[IRQMP_NCPU_MAX]; /* 0x80 */
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uint32_t pextack[IRQMP_NCPU_MAX]; /* 0xc0 */
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};
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#define IRQMP_PEXTACK_EID (0x1f << 0)
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static volatile struct irqmp_regs *get_irqmp_regs(void)
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{
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return (struct irqmp_regs *) DT_INST_REG_ADDR(0);
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}
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static int get_irqmp_eirq(void)
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{
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return DT_INST_PROP(0, eirq);
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}
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void arch_irq_enable(unsigned int source)
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{
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volatile struct irqmp_regs *regs = get_irqmp_regs();
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volatile uint32_t *pimask = ®s->pimask[0];
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const uint32_t setbit = (1U << source);
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unsigned int key;
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key = arch_irq_lock();
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*pimask |= setbit;
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arch_irq_unlock(key);
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}
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void arch_irq_disable(unsigned int source)
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{
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volatile struct irqmp_regs *regs = get_irqmp_regs();
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volatile uint32_t *pimask = ®s->pimask[0];
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const uint32_t keepbits = ~(1U << source);
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unsigned int key;
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key = arch_irq_lock();
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*pimask &= keepbits;
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arch_irq_unlock(key);
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}
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int arch_irq_is_enabled(unsigned int source)
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{
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volatile struct irqmp_regs *regs = get_irqmp_regs();
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volatile uint32_t *pimask = ®s->pimask[0];
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return !!(*pimask & (1U << source));
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}
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int z_sparc_int_get_source(int irl)
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{
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volatile struct irqmp_regs *regs = get_irqmp_regs();
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const int eirq = get_irqmp_eirq();
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int source;
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if ((eirq != 0) && (irl == eirq)) {
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source = regs->pextack[0] & IRQMP_PEXTACK_EID;
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if (source == 0) {
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source = irl;
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}
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} else {
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source = irl;
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}
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return source;
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}
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static int irqmp_init(void)
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{
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volatile struct irqmp_regs *regs = get_irqmp_regs();
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regs->ilevel = 0;
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regs->ipend = 0;
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regs->iforce0 = 0;
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regs->pimask[0] = 0;
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regs->piforce[0] = 0xfffe0000;
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return 0;
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}
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SYS_INIT(irqmp_init, PRE_KERNEL_1, CONFIG_INTC_INIT_PRIORITY);
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