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Revert "xen/arm: add i.MX8M platform support"
This reverts commit 6febf12df5 as it is
missing a change that was incorrectly committed with a different patch.
This commit is contained in:
Michal Orzel committed
1 parent
9c5c40fd54
commit
3ca5ce7cd0
2 files changed
-162
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@@ -9,7 +9,6 @@ obj-$(CONFIG_ALL_PLAT) += sunxi.o
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obj-$(CONFIG_ALL64_PLAT) += thunderx.o
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obj-$(CONFIG_ALL64_PLAT) += xgene-storm.o
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obj-$(CONFIG_ALL64_PLAT) += brcm-raspberry-pi.o
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obj-$(CONFIG_ALL64_PLAT) += imx8m.o
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obj-$(CONFIG_ALL64_PLAT) += imx8qm.o
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obj-$(CONFIG_MPSOC_PLATFORM) += xilinx-zynqmp.o
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obj-$(CONFIG_MPSOC_PLATFORM) += xilinx-zynqmp-eemi.o
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@@ -1,161 +0,0 @@
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* i.MX 8M family setup
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*
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* Copyright 2026 Open-EP (E-Paper) Community
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*/
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#include <xen/sched.h>
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#include <asm/platform.h>
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#include <asm/regs.h>
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#include <asm/smccc.h>
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static const char * const imx8m_dt_compat[] __initconst =
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{
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"fsl,imx8mp",
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"fsl,imx8mq",
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"fsl,imx8mm",
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"fsl,imx8mn",
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NULL
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};
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#define IMX_SIP_FID(fid) \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_CONV_64, \
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ARM_SMCCC_OWNER_SIP, \
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(fid))
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/*
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* SiP SMC function IDs used by the i.MX8M Linux drivers. There is no
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* public specification for these; the IDs and their subfunctions are
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* extracted from the vendor kernel call sites (see drivers/soc/imx,
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* drivers/devfreq, drivers/remoteproc).
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*/
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#define IMX_SIP_F_GPC 0x0 /* GPC power-domain control */
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#define IMX_SIP_F_CPUFREQ 0x1 /* CPU frequency scaling */
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#define IMX_SIP_F_DDR_DVFS 0x4 /* DRAM frequency scaling */
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#define IMX_SIP_F_SRC 0x5 /* SRC: M-core remoteproc start/stop */
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#define IMX_SIP_F_SOC_INFO 0x6 /* read-only SoC info query */
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#define IMX_SIP_F_NOC 0x8 /* NoC QoS priority setup */
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#define IMX_SIP_GPC_SF_PM_DOMAIN 0x03
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#define IMX_SIP_SRC_SF_M4_START 0x00
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#define IMX_SIP_SRC_SF_M4_STARTED 0x01
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#define IMX_SIP_SRC_SF_M4_STOP 0x02
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#define IMX_SIP_NOC_SF_PRIORITY 0x01
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static bool imx8m_smc(struct cpu_user_regs *regs)
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{
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uint32_t function_id = get_user_reg(regs, 0);
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uint32_t subfunction_id = get_user_reg(regs, 1);
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struct arm_smccc_res res;
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if ( !cpus_have_const_cap(ARM_SMCCC_1_1) )
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{
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printk_once(XENLOG_WARNING
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"imx8m: smc: no SMCCC 1.1 support. Disabling firmware calls\n");
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return false;
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}
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/* Only the hardware domain may use the SiP calls */
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if ( !is_hardware_domain(current->domain) )
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{
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gprintk(XENLOG_WARNING, "imx8m: smc: No access\n");
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return false;
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}
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/*
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* Forward only the subfunctions the dom0 kernel actually issues. All
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* of these manage hardware that belongs to the hardware domain (power
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* domains, M-core, NoC) or are read-only queries.
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*/
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switch ( function_id )
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{
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case IMX_SIP_FID(IMX_SIP_F_GPC):
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if ( subfunction_id != IMX_SIP_GPC_SF_PM_DOMAIN )
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return false;
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break;
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/*
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* CPU and DRAM frequency scaling: the hardware domain does not see the
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* whole system and cannot make an informed decision about resources
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* shared with the other domains, so deny both (CPU frequency scaling
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* is denied on the i.MX8QM platform for the same reason).
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*/
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case IMX_SIP_FID(IMX_SIP_F_CPUFREQ):
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case IMX_SIP_FID(IMX_SIP_F_DDR_DVFS):
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return false;
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case IMX_SIP_FID(IMX_SIP_F_SRC):
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/* SRC: M-core remoteproc start, poll-started and stop. */
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switch ( subfunction_id )
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{
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case IMX_SIP_SRC_SF_M4_START:
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case IMX_SIP_SRC_SF_M4_STARTED:
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case IMX_SIP_SRC_SF_M4_STOP:
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break;
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default:
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return false;
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}
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break;
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case IMX_SIP_FID(IMX_SIP_F_SOC_INFO):
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break;
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case IMX_SIP_FID(IMX_SIP_F_NOC):
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/*
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* NoC QoS priority setup. Only i.MX8MQ issues this at boot;
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* i.MX8MP issues no NoC call, but the platform covers both.
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*/
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switch ( subfunction_id )
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{
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case IMX_SIP_NOC_SF_PRIORITY:
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break;
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default:
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return false;
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}
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break;
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default:
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gprintk(XENLOG_WARNING,
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"imx8m: smc: Unknown function id %x subfunction id %x\n",
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function_id, subfunction_id);
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return false;
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}
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arm_smccc_1_1_smc(function_id,
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subfunction_id,
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get_user_reg(regs, 2),
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get_user_reg(regs, 3),
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get_user_reg(regs, 4),
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get_user_reg(regs, 5),
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get_user_reg(regs, 6),
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get_user_reg(regs, 7),
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&res);
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set_user_reg(regs, 0, res.a0);
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set_user_reg(regs, 1, res.a1);
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set_user_reg(regs, 2, res.a2);
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set_user_reg(regs, 3, res.a3);
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return true;
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}
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PLATFORM_START(imx8m, "i.MX 8M")
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.compatible = imx8m_dt_compat,
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.smc = imx8m_smc,
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PLATFORM_END
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/*
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* Local variables:
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* mode: C
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* c-file-style: "BSD"
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* c-basic-offset: 4
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* indent-tabs-mode: nil
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* End:
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*/
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